Crazy Aaron's Thinking Putty - Eye Candy Hyper Color - It'll Be Like Putty In Your Hands It's called Thinking Putty because while you do whatever you want with it, your brain relaxes and opens up to all kinds of creative thinking. Need it Yes. And you can also knead it. Or bounce it, bend it, tear it, stretch it, snap it, pop it. Comes in a 4" dia x 1-3/8" tin. Eye Candy Blue and Pink Hyper Colors is Heat-sensitive Putty that changes magically while you play. It's so darn addicting, you won't be able to put it down!