My daycare kids of all ages love to create different shapes and designs with these tangrams. Thay are very sturdy and easy to manipulate.

The tangrams pieces are great, but I wish there were diagrams of puzzles to solve. The little paper folder that came with the set touted as a guide may work for math teachers but not the rest of us. (I am a public children's librarian). The 5 stars for the product went down 3 for this reason.