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! As a Hypercolor Thinking Putty, Amethyst Blush is thermodynamic - 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. Crazy Aarons Thinking Putty is made in the USA!