The National Geographic Mega Science Series Glow in the Dark Science Kit is an astounding set of experiments and activities that all glow when the lights are out! The crystal growing set in this kit results in a marvelous glow-in-the-dark crystal specimen you can proudly display. There are two DIY slime packs in this kit as well, allowing you to mix and play with your own glow-in-the-dark purple and green slime. You can keep them both fresh longer with the included storage containers. And glow-in-the-dark putty will astound kids as they use the included UV light keychain to draw pictures and words that glow when the lights are off! Included in this Mega Kit: 1 Glowing Crystal Seed, 2 DIY Slime Powders (Glowing Green & Glowing Purple), 2 Slime Containers to store your Slime, 1 Glowing Putty with Storage Tin, 1 Wernerite Rock, 1 Special UV Light, 1 Full-Color Learning Guide. Instructions for each activity are clear and easy-to-follow, and the full-color learning guide teaches the science of slime, putty, and crystals! This is more than just a crystal making kit, or a slime pack, or a putty lab – this kit is all of these in one! National Geographic Toys makes the highest quality hands-on science toys, and all products are backed by exceptional service. About the National Geographic Society: With a mission to inspire people to care about the planet, the National Geographic Society is one of the world’s largest nonprofit scientific and educational organizations.