Stretchy, Squishy fun for adventures under the sun! Del Sols unique Sol Putty changes color with sunlight and then returns to its original color without sunlight. Its like magic. The magic of Sol Putty is unleashed when you take it outside in the sun and set it free in the hands of any child or child at heart. The nontoxic, all-organic formula does not stain and is water soluble. It smells good, too! Its an alien blob, a glob of goo, its whatever you want, and it glows in sunshine, too!