The National Geographic Mega Science Series Glow-in-the-Dark Science Kit contains four awesome science activities that will illuminate your imagination. This kit includes both purple and green glow-in-the-dark slime kits, allowing you to make your own slime right at home. There?s also incredible glow-in-the-dark putty, along with a UV light keychain that makes it possible to draw glowing images or words in the putty itself. You get everything you need to grow your own glow-in the-dark crystal, along with a fluorescent wernerite specimen that glows when you shine your UV light on it. Instructions for each activity are included in the kit, as well as a complete learning guide that teaches all about crystals, slime, putty, and fluorescence.