This black putty with subtle green sparkles reacts to the included strong magnet. Set the magnet to the side of the putty, and watch it work its way over to the magnet. Once magnetized it will pick up things like paper clips.
It won't dry out and is just fun to fidget with. Think of it as a squeeze toy, a therapy ball, or a stress ball.
Each 4" tin is and packed with 1/5lb of Thinking Putty