JA-RU Lab Putty LED Scribbler Sensory Putty for Kids w/Mini UV Light Flashlight (1 Unit) Invisible Ink Magic Color Changing Putty. Stress Relief Toy. Mini Slime Party Favors. 9574-1A

Here comes a whole new way to play with some of the coolest stuff on earth. Warm up to this Heat-Sensitive Putty that changes hues just using your body heat. Just hold the putty for a little while will make it turn into a totally new color. Play with your Lab Putty at home, school, work, the car, anywhere! Guaranteed to never dry out! You'll find yourself tearing off a handful and using it to relieve stress while your brain ponders infinite creative possibilities. Don't worry: LED Scribbler Lab Putty still sculpts, tears, bounces, stretches, and even shatters like other Lab Putties around. So go ahead and play with it, and experiments with your friend the cool color variations when exposing this putty to various light sources.

Lab putty is 100% safe, non-toxic and conforms to the safety requirements of ASTM F963 and D-4236. Net weight of 1 Oz, container size is about 3.25" (diameter) X 0.7" (height).