The Rubbabu Rubbablox Basix block set has rubber-based blocks in bright colors that fit on top of each other. Squishy and soft, the tactile, velvety surface encourages kids to push, move and grasp. The simple design promotes imaginative play and helps develop critical thinking skills. Details: 20 piecesEco-friendly Natural rubber foam For ages 12 months and up Contents: 10 rectangular blocks (4.5") 10 square blocks (2.25")