Just as an evening sky melts into the dark of night, Twilight Thinking Putty's deep purple color disappears with a touch of heat to reveal a fluorescent blue complexion. Grab some stress relieving, hand exercising, mind expanding, totally fun and addicting Thinking Putty! These Heat Sensitive Hypercolors really make their mark! Hypercolor Thinking Putty is thermo chromic-just a touch from your hands or a warm coffee mug will reveal a new "hot" color. Allow it to cool off or stick it in the fridge! Then the "cool" color will be restored. This is the smaller version tin at a little less than an ounce. "Keep your hands busy with Thinking Putty and free up more space in your brain. There's nothing silly about Thinking Putty!"
With a touch of heat watch it turn blue
Stick in the fridge to get it cold again back to purple
Made in the USA
Not recommended for ages 3 and under