Just like its name implies, Liquid Glass Thinking Putty is unlike anything you've ever seen. This Crazy Aaron's Putty is so transparent that the tin often appears empty to the naked eye. Liquid Glass putty becomes cloudy with use and changes back to crystal clear. Thinking Putty helps build hand and finger strength through a fabulous tactile play experience Crazy Aaron's putty won't dry out, and won't leave a sticky or slippery residue on your fingers. Stretch it, bounce it, pop it, tear it, and sculpt it! Contents: 1 x Crazy Aaron's Thinking Putty Liquid Glass