Enormous fabric balloons. With the slightest of touches Buoyancy Balloons will ascend, float in the breeze and then gradually descend to earth! Suitable for a whole range of supervised activities to captivate children. Ball, dia. 1.2m. Cube, size: 1.2 L x 1.2 W x 1.2m H. Pyramid, size: 1.2 L x 1.2m H.