PicassoTiles introduces frustration-free building with their soft hedgehog-shaped 3D brushy shape building blocks (PTB41). The 41-piece base set fosters essential skills like hand-eye coordination, color recognition, and STEAM learning while providing endless building possibilities. With easy interlocking connectivity and a handy idea booklet, children can jump right into constructing imaginative designs. Picasso Toys 41pc Hedgehog Hedgehog Block Building Blocks Construction Toy Set w/IdeaBook Learning Playset None Magnetic STEM STEAM Educational Kit Child Brain Development Preschool Kindergarten PTB41 | Picassotiles | | PICASSO-TILES 41 PC Hedgehog Building Blocks Set, STEM Toys for Kids 3+ | Best Buy