Be amazed by this Smart Glass Putt that's so clear, you'd think the tin container is empty at first glance! This putty turns cloudy when kneaded but let it sit for some time and it will go back to its original transparent state. Mold, play, pull apart, shape, or just squish it while you think and focus. The Moldable Glass Putty won't dry out either. It's an ideal toy for thinkers and fidgeters out there!