This fabulous Falling Water Liquid Glass Thinking Putty from Crazy Aaron's Puttyworld boasts a crystal-clear blue hue that's truly one-of-a-kind, plus iridescent accents that add a little sparkle and shine to playtime. Crazy Aaron's putty is non-toxic, won't dry out, and won't leave a sticky or slippery residue on your fingers, so it's great for stretching, molding, and playing by kids and adults alike!