Spatial awareness and geometric patterns are great to learn about when you have a big morphing sphere. The Flexahedron construction set is made of interlocking pentagons and triangles. with the amazing morphing power of KnuckleStrutz joints, this building toy can transform into three different objects, while all of the pieces are still connected! With its many pieces, you can also build the Hyper Bike and Fighter Jet from our main product line.