With 6 multi colored shapes you can build a square, a triangle and a circle..... but when you start to mix these shapes and the metal balls, the coolest looking acrobatic figures appear. Create your own acrobatic structures, or try to build the structure on one of the 24 picture challenge cards which are included. The red base has a metal surface which gives the needed stability when building the craziest acrobatic structures. Magnetic. Ages 1 to 5. 13 pieces.