Made from silicone, the ingredient of the original 'silly putty', Glow Bouncing putty never dries out and exhibits extreme elasticity. Stretch it, bounce it, snap it - the amazing properties are enhanced by the fact that it glows in the dark. Demonstrates non-newtonian properties. Supplied in eggs shaped containers approx 6cm long and packed 24 eggs per display box. For ages 6 and up.