Experience holiday sparkle with Crazy Aaron's Sugar Plum Shine Liquid Glass Thinking Putty, a crystal-clear plum putty that transitions seamlessly from clear to cloudy and back again with each use, providing a captivating sensory experience for users of all ages. Thinking Putty® helps build hand and finger strength through a fabulous tactile play experience with unique, unexpected properties and provides relaxing, yet stimulating interaction. Crazy Aaron’s putty is non-toxic, won't dry out, and won't leave a sticky or slippery residue on your fingers. Recommended for kids and adults ages 3 and up.