Johntoy Smart Putty You can shape this Smart Putty from Johntoy exactly the way you want it. Squeeze and knead and feel the stress flow away from your body! But it gets even more fun: the body heat that enters your Putty during kneading changes its color! Crazy, right? Specifications: Color: green Gender: junior/unisex Material: rubber Packaging diameter: 8 cm Age: from 6 years Contents: 1 Can with Smart Putty