Award-winning ImagiBRICKS Giant Building Blocks are an enduring classic that offer endless play possibilities because they are versatile (build with them, jump over them, crash into them) and safe. Constructed of lightweight corrugated cardboard, if the blocks tumble, no one gets hurt! Because these blocks are large, they'll help your child gain confidence, and encourage social play. The blocks are printed with non-toxic inks and with their water-resistant coating are strong and durable for years of creative play. Ages 18 mos.+