To reduce size and cost and to make interesting by pushing a part of the wheels of a traveling toy between a part of a swinging member at an initial position and the inner surface of a rail so as to operate scene parts.

A step tread (swinging member 104 between rails 103 is operated in a horizontal direction by the flange of the wheel of a toy train 101 coming traveling on the rails 103 and through the use of this operation, a cut-off arm 102 linked with the step tread 104 by a power transmission part is moved up and down. The toy 101 has a motor to operate with current inside of it and travels by supplying power from the rails 103. A flange is formed inside of the wheel of the toy 101 and the toy travels along the rail 103 by housing this flange inside of the rail 103. Such a constitution dispenses with expensive parts such as sensor, electromagnet and the like.