PicassoTiles 240 piece hedgehog building block shapes offer easy connectivity. It's simple to disconnect to maximize fun and build more creative designs. Children will learn the colors, shapes and develop sorting, stacking, and concentration all at once throughout the play. Our building block set are constructed from the highest quality materials to ensure its strength and sturdiness. Each piece manufactured by high-quality, toxic-free, BPA-free materials with the highest standards to ensure the safety of the children. For ages 3+ years.