Mimicking a magnificent desert sunset, Goodnight Cactus Thinking Putty changes color with the heat of your hands. This triple change Hypercolor captures the peaceful purple, luminous orange, and radiant yellow sundown of the night sky.

Thinking 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, bouncing, tearing, popping and playing by kids and adults alike.