The invention relates to a play structure comprising a base (1) that rests on the ground and at least one element (1) that can be mounted on the base in an upright position in order for the structure to be used, said base comprising: a central frame (5) on which the element is mounted, and wheels (8) mounted on the frame in order to allow the structure to be moved. At least some of the wheels can be filled with a ballast material in order to form a counterweight to the element (2) when in the upright position in order for the structure to be used.