These Heat Sensitive Hypercolors really make their mark!

Hypercolor Thinking Putty is thermochromic -- 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.

Amethyst Blush Thinking Putty's soothing color will ease your nerves. With just a touch of warmth, the purple fades to reveal a surprising pink blush! Exciting and bright, this dynamic Thinking Putty is sure to perk up your day!

Made in the USA!

Each metal tin is hand packed with 1/5 lb of Thinking Putty, much more than you get in a plastic egg!

Ages 3 and up.