PURPOSE: To provide a playground suitable for children constituted to have a plurality of window parts in which a transparent plate is fitted and build round a wall body, having a proper height, in a circular shape.

CONSTITUTION: A playground 1 is built such that a wall body built round in a circular shape has an entrance 3 and a plurality of window parts 4... and an slightly elevated finish part 5 is built at the interior surrounded with a wall body 2. The wall body 2 consists of, for example, eleven wall panels 10.... The wall panel 10 is provided with a peripheral frame 14 formed such that the two ends of curved horizontal upper and lower frame materials 11 and 12 are interconnected through vertical frame materials 13 and 13. The wall body 2 having eleven window parts 4. is built such that the adjoining wall panels are intercoupled integrally in a non-falling state through a coupling fitment 23, attached astride between the two panels, by means of screws attached in a screwed-in state in respective screw holes 22... of the adjoining wall panels 10 and 10. Height H from a floor is regulated to 80-120cm. This constitution prevents the fall of a child from the upper end of the wall body 2 and causes children to see an outside situation from the inside.