Crazy Aaron's - Hypercolor Thinking Putty - Mermaid

Thinking Putty comes in 30 colors, including glow-in-the-dark, heat-sensitive, and electric-colored putty. It can stretch like rubber and bounce like a ball, and because it's silicone-based, it won't dry out or crumble over time. It's part toy, part stress reliever, part physical therapy and entirely addictive.