An award-winning classic that offers endless play possibilities! Since they’re constructed of lightweight corrugated cardboard, if the blocks tumble, no one gets hurt! Blocks are printed with non-toxic inks and feature a water-resistant coating for years of creative play. Large blocks measure 12" x 6" x 3"; medium blocks are 6" x 6" x 3"; small blocks are 6" x 3" x 3". Ages 1 1/2 and up. 4 Large Red, 6 Medium Yellow & 15 Small Blue.