It can be assembled to different 3-D shape, but if followed by a certain rule, then it can be assembled to a spheroid, the size is similar to a football. 3D puzzle is intelligent toy emphasizing using children's brain. It can train children's thinking ability and encourage children's desire of creation. For ground activity, it can be used in kindergarten or courtyard for children's climbing and rolling.
Children also can get into inside of the ball, experience the fun of rolling inside the spheroid.
Because it is made by material of EVA foaming, it can float on water and the children can get into the ball. PB-03 can be used as a floated boat for children's water activity or rest.