Freshly sprung flowers are nature’s way of celebrating the season. Join in on the fun with this putty that is a rich lilac purple when cool, it warms to a happy spring green. As part of the Hypercolor® Collection this color changing Thinking Putty® is heat sensitive, meaning it starts one color and changes to another through heat transfer. The more you play the more the color will change! Thinking Putty® helps build hand and finger strength through a fabulous tactile play experience with unique, unexpected properties and provides relaxing, yet stimulating interaction for anyone with sensory integration issues. Crazy Aaron's putty is non-toxic, won't dry out, and won't leave a sticky or slippery residue on your fingers, so it's great for stretching, molding, bouncing, tearing, popping and playing by kids and adults alike. Stretch it, bounce it, pop it, tear it, and sculpt it! Never dries out! Fun for ages 3+ Made in the USA with the finest materials from around the world