Novelty Backpack The present invention relates to the field of bags. In particular a backpack is described wherein animated effects are provided by the incorporation of movable features. The term backpack relates to a portable container or receptacle suitable for carrying articles. Such receptacles normally incorporate one or two shoulder straps so as to allow a user to position the pack over their shoulders in a manner that allows for the weight of the pack and the contained articles to be spread over the shoulders and back of the user. Backpacks are often capable of being closed at the mouth and are known to be made from a variety of materials, including leather, plastic or cloth. It is known in the art to provide bags with fanciful designs so as to make them more attractive for users. In particular, it is common to produce backpacks that incorporate a picture of characters or more general images taken from popular television programmes or feature films in order to make these products more appealing to children. It is an object of an embodiment of the present invention to provide a bag that incorporates moveable features thus rendering the bag more appealing to children. Summary of Invention According to a first aspect of the present invention there is provided a backpack wherein the backpack comprises one or more moveable features and one or more control mechanisms connected to the one or more moveable features wherein activation of the one or more control mechanisms acts to move one or more of the moveable features. The above arrangement adapts a functional backpack so as to provide it with one or more moveable features which provide the backpack with a degree of user controlled animation. The movement of the one or more movable features may comprise a translational movement of the one or more moveable features. Alternatively, the movement of the one or more movable features comprises a rotational movement of the one or more moveable features. The movement of the one or more movable features may comprise a translational and rotational movement of the one or more moveable features. Most preferably one or more of the moveable features are located on an external surface of the backpack. In this embodiment the moveable features are fully visible to an observer prior to the activation of the one or more control mechanisms. Preferably the backpack comprises one or more activators wherein operation of the one or more activators provides a means for activating one or more of the control mechanisms. Most preferably the one or more moveable features are biased in a first position. Preferably activation of the one or more control mechanisms causes one or more of the moveable features to move away from the first position. The one or more control mechanisms may be located on a plate. It is preferable for the one or more control mechanisms to be located internally within the backpack. This is preferable so that an observer will not see when the user induces movement of the one or more moveable features and thus there is no detraction from surprise and amusement induced by the backpack. Most preferably the backpack further comprises a speaker. Preferably the activation of the one or more of the control mechanisms induces a sound to be generated from the speaker. Optionally the one or more control mechanisms comprise a cord mechanically connected to one or more moveable features. In this embodiment, the one or more activators may comprise a ring attached to one end of the cord. Alternatively the one or more control mechanisms may comprise an electrical circuit connected to one or more moveable features. In this embodiment, the one or more activators may comprise an electrical switch. The electrical switch may be located within a remote control. In this embodiment the one or more moveable features may be controlled without the user having to have physical contact with the backpack. The one or more moveable features may comprise a moveable features selected from the set comprising eyes, ears, horns and tongues. The tongue may be located in a recess and configured to move longitudinally relative to the plate. The recess may comprise a wall having a sloped profile such that the tongue is displaced away from the plate as it moves longitudinally relative to the plate. According to a second aspect of the present invention there is provided a method of animating a backpack the method comprising:

- providing the backpack with one or more moveable features;

- providing the backpack with one or more control mechanisms connected to the one or more moveable features;

- activating the one or more control mechanisms so as to induce a movement of one or more of the moveable features. Most preferably the one or more control mechanisms are activated manually. The induced movement of the one or more movable features may comprise a translational movement of the one or more moveable features. Alternatively, the induced movement of the one or more movable features comprises a rotational movement of the one or more moveable features. The movement of the one or more movable features may comprise a translational and rotational movement of the one or more moveable features. Preferably the method further comprises providing the backpack with one or more activators the operation of which activates one or more of the control mechanisms. Most preferably the activation of the one or more of the control mechanisms acts to induce a sound to accompany the movement of one or more of the moveable features. Embodiments of the second aspect of the present invention may comprise features to implement the preferred or optional features of the first aspect of the invention or vice versa. Brief Description of Drawings Aspects and advantages of the present invention will become apparent upon reading the following detailed description and upon reference to the following drawings in which: Figure 1 presents a rear view of a backpack being worn by a user in accordance with an embodiment of the present invention; Figure 2 presents a front view of the backpack of Figure 1 being worn by a user; and Figure 3 presents:

(a) a perspective view of a first embodiment of an internal plate for the backpack of Figure 1 ; and

(b) a schematic front view of an alternative embodiment of an internal plate of the backpack of Figure 1 ; and Figure 4 presents a schematic front view of a further alternative embodiment of an internal plate of the backpack of Figure 1 . In the description which follows, like parts are marked throughout the specification and drawings with the same reference numerals. The drawings are not necessarily to scale and the proportions of certain parts have been exaggerated to better illustrate details and features of embodiments of the invention. Detailed Description Figure 1 presents a representation of a backpack 1 in accordance with an embodiment of the present invention. The backpack 1 can be seen to be in the form of a monster. The backpack 1 is worn by a user 2 by locating straps 3a and 3b over their shoulders. Located around the flap 4 of the backpack 1 is the monster's head 5 which, in the presently described embodiment, comprises two eyes 6a and 6b; a tongue 7; two ears 8a and 8b; and two horns 9a and 9b one or more of which may function as movable novelty features of the backpack 1 . The operation of these moveable features will now be further described with reference to Figures 2 and 3. In particular, Figure 2 presents a front view of the backpack 1 of Figure 1 while Figure 3 presents a perspective view and a schematic front view of two embodiments of an internal plate 10a and 10b of the backpack 1 of Figurel . The internal plates 10a and 10b are preferably located within the flap 4 so that their components are hidden from view. They can be seen to comprise a first 1 1 , a second 12 and a third manually operated control mechanism 13 which act to control the position of the eyes 6a and 6b and the tongue 7 of the backpack 1 , respectively. The first 1 1 and second 12 manually operated control mechanisms are similar in design and are employed to operate the left 6a and right eyes 6b of the backpack 1 , respectfully. Each mechanism 1 1 and 12 comprises an eyelid control plate 14 having three tab and pin mechanisms 15, 16 and 17, one 15 located to the upper side of the eyelid control plate 14 and one 16 and 17 on either side of the eyelid control plate 14. The pins of the three tab and pin mechanisms 15, 16 and 17 are movably located within corresponding slots 18, 19 and 20 of the internal plate 10a. Each of the slots 18, 19 and 20 are shown to be substantially parallel. Fixed between the internal plate 10a and the tab and pin mechanisms 16 and 17 is a length of elastic 21 . The lengths of elastic 21 provide a means for biasing the eyelid control plates 14 such that the eyes 6a and 6b appear to be in a closed position. Fixed between the tab and pin mechanisms 15 and movement activators, which in the present embodiment comprise rings 22a and 22b are lengths of cord 23a and 23b. The user 2 can then employ the rings 22a and 22b so as to pull on one of the lengths of cords 23a and 23b and thus overcome the tension provided by the corresponding length of elastic 21 so moving the corresponding eye 6a and 6b from the closed position to an open position. It will be readily apparent to the skilled reader that the orientation of the lengths of elastic 21 and the lengths of the cords 23a and 23b with respect to the eyelid control plates 14 could be reversed such that one or both of the eyes 6a and 6b are biased in an open position. In this embodiment, when the user 2 activates movement by pulling on the rings 22a and 22b the tension provided by the corresponding lengths of elastic 21 is again overcome so moving the corresponding eye 6a and 6b from the open position to a closed position. The third manually operated control mechanism 13, employed to control the position of the tongue 7 of the backpack 1 , operates in a similar manner to the previously described with respect to the first 1 1 and second 12 manually operated control mechanisms. In the embodiment presented in Figure 3(a) the third manually operated control mechanism 13 can be seen to comprise a tongue control plate 24 located within a recess 25 of the internal plate 10a. A fixing plate 26 may be employed to help retain the tongue control plate 24 within the recess 25. Two lengths of elastic 21 connected between the tongue control plate 24 and the recess 25 and act to bias the tongue control plate 24 within the recess 25. A length of cord 23c is attached between a movement activator, ring 22c, and the tongue control plate 24 such that when the user 2 employs the ring 22c so as to pull on the length of cord 23c they overcome the tension provided by the corresponding lengths of elastic 21 resulting in the tongue 7 moving longitudinally relative to the internal plate 10a. This provides the monster with the effect that it is sticking its tongue 7 out of its mouth. In the embodiment presented in Figure 3(b) the third manually operated control mechanism 13 can again be seen to comprise a tongue control plate 24 located within the recess 25 of the internal plate 10b. The fixing plate 26 may again be employed to help retain the tongue control plate 24 with the recess 25. However, in this embodiment a single length of elastic 21 is connected between the tongue control plate 24 and the fixing plate 26 act so as to bias the tongue control plate 24 in an extended position from the recess 25. The length of cord 23c is again attached between the ring 22c and the tongue control plate 24 such that when the user 2 employs the ring 22c so as to pull on the length of cords 23c they overcome the tension provided by the length of elastic 21 resulting in the tongue 7 moving longitudinally relative to the internal plate 10b and into the recess. This provides the monster with the effect that it is moving its tongue 7 into of its mouth. In yet a further alternative embodiment, the rear surface of the recess 25 may also have a sloped profile so as to also displace the tongue control plate 24 away from the internal plate 10a and 10b as it moves longitudinally relative to the internal plate 10a and 10b and out of the recess 25. This provides a more realistic effect to the projection of the tongue 7 from the mouth of the monster. A preferred feature for all of the above described embodiments is to have the lengths of cord 23a, 23b and 23c pass internally from the internal plates 10a and 10b and down through the straps 3a and 3b before exiting the straps 3a and 3b at the front of the backpack 1 . With this arrangement there is a reduced chance of the lengths of cord 23a, 23b and 23c becoming entangled with each other. Further physical protection can be provided for the lengths of cord 23a, 23b and 23c by locating them within recessed channels 27 on the internal plate 10a and 10b. Clips 28 may also be employed so as to assist in retaining the lengths of cord 23a, 23b and 23c within associated recessed channels. Keeping the lengths of cord 23a, 23b and 23c straight and isolated from each other is found to reduce friction and provide good and consistent movement of the lengths of cord 23a, 23b and 23c. This results in a prolonged lifetime for the backpack 1 as well as ease of activation by the user 2. Each length of cord 23a, 23b and 23c may have a label 29a, 29b and 29c associated with it so as to allow a user 2 to easily identify its function e.g. open eye, stick out tongue. Preferably these labels 29a, 29b and 29c are attached to the movement activators, namely rings 22a, 22b, and 22c associated with each of the lengths of cord 23a, 23b and 23c. Enclosing the lengths of cord 23a, 23b and 23c within the backpack, as described above, also acts to enhance the impact of the operation of the one or more moveable parts to third party observers. This is because it will not be obvious to these observers when the user 2 pulls on one of the lengths of cord 23a, 23b and 23c so as to activate one of the moveable features. It will be appreciated from the above description that the internal plates 10a and 10b are configured to control the eyes 6a and 6b and the tongue 7 however in alternative embodiments they can be adapted so as to allow for movement of one or more of the ears 8a and 8b or horns 9a and 9b of the backpack 1 . The movement of one or more of the ears 8a and 8b or horns 9a and 9b may be a rotational movement or a combination of rotational and translational movement. It is preferable that when a cord 23 is pulled so as to activate a movable features of the backpack 1 that it also activates a corresponding sound to be produced by the backpack 1 . In the presently described embodiments this is achieved by the movement of the eyelid control plates 14 and or the tongue control plate 24 being detected by a CPU 30. The CPU 30 then selects a corresponding sound from an internal database to be played through a speaker 31 located within the backpack 1 e.g. upon the internal plate 10. The sound may be preselected so as to always correspond to the movement of a particular feature or alternatively may be picked at random from the database of predetermined sounds. In an alternative embodiment the internal plates may be omitted. In these embodiments the manually operated control mechanism 1 1 , 12 and 13 would simply be fixed into the fabric of the backpack 1 . It will be appreciated by the skilled reader that the moveable features in all of the above described embodiments may comprise alternative activation means. By way of example, and with reference to Figure 4, instead of lengths of cord 23a, 23b and 23c being employed to mechanically control the position of a mechanical feature this may

alternatively be achieved through the employment of an electrical circuit 32 through which a user 2 may activate and deactivate one or more pairs of electromagnets 33. For example, operation of the moveable features may be activated by the user 2 employing one or more switches located within the straps 3 of the backpack 1 . Alternatively, the operation of the of the moveable features may be activated by the user 2 employing a remote control 34 so that they do not require to be in physical contact with the backpack 1 or bag in order activate these features. To allow this embodiment to function correctly the electrical circuit 32 would obviously be required to comprise a suitable receiver. In the embodiment presented in Figure 4 the current direction of the electromagnets 33 associated with the eyes 6a and 6b is such that they act to repel each other, thus overcoming the biasing force on the eyes 6a and 6b e.g. gravity. However, the current direction of the electromagnets 33 associated with the tongue 7 is such that they act to attract each other while overcoming the biasing force on the tongue 7. Lengths of elastic 21 could alternatively be employed in this embodiment to provide the biasing force for the associated moveable feature. Once the respective current is turned off the associated bias force causes the moveable feature to return to its original position. Although Figure 4 presents a pair of electromagnets 33 associated with each moveable feature it will be appreciated that in a further alternative embodiment one of these electromagnets 33 could be replaces with a permanent magnet. It will also be appreciated by the skilled reader that the location of the electromagnets 33, and their associated direction of current, may be also varied so as to provide alternative bias positions and or direction of motion for the associated moveable feature. The above described backpacks comprise a number of moveable components that provide novel animated effects which are controlled by the user of the backpack. The movement of these components may be accompanied by sounds which add to the overall surprise and amusement induced by the bags to surrounding observers. The amusement and surprise is further enhanced by having the means for controlling the moveable

components discretely located within the backpack so that they are not immediately obvious to these observers. Locating the control mechanisms within the backpack also provides them with physical protection and assists in preventing them becoming entangled with each other or with other components of the backpack. The foregoing description of the invention has been presented for purposes of illustration and description and is not intended to be exhaustive or to limit the invention to the precise form disclosed. The described embodiments were chosen and described in order to best explain the principles of the invention and its practical application to thereby enable others skilled in the art to best utilise the invention in various embodiments and with various modifications as are suited to the particular use contemplated. Therefore, further modifications or improvements may be incorporated without departing from the scope of the invention as defined by the appended claims.