Bounce, stretch, snap, and pop your way to less stress, more creativity, and better thinking with Crazy Aaron’s thinking putty mini tins  Since 1998, Crazy Aaron’s has been making Thinking Putty® and other creations that inspire curiosity and wonder to kids and adults of all ages. From amazing effects like magnetism and UV reactivity to stress-relieving scents and DIY kits, there’s something for everyone. These carefully crafted works of art are made from Crazy Aaron’s very own secret formulas that transform amazing natural phenomena into highly designed products that are cool and lots of fun! 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.Thinking 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. approx size 4cm