Using this Liquid Glass Thinking Putty is easy. Just take it out of the tin and start playing with your hands. Roll it, stretch it gently, and enjoy the unique tactile experience. When you play, you'll notice it changing from clear to cloudy and back again. Be aware that it doesn't have the same elasticity as other putties, so don't expect it to bounce. It's meant to be enjoyed for its transparency. To maintain it, simply keep it in the tin when not in use. This putty is non - toxic, but still, keep it away from small children who might put it in their mouths. And since it won't dry out, you can keep using it for a long time. Have fun pranking your friends with this cool putty too!