National Geographic’s Crystal Growing Kits bring you an unparalleled crystal growing experience. Our full-color learning guides are packed with fascinating crystal facts giving you the most comprehensive crystal kits on the market! We even include real crystal specimens to display with your home grown crystals,The perfect family activity. Become a scientist and grow amazing crystals that actually glow-in-the-dark!There’s no better way to learn. Children love exploring the wonders of science through hands-on projects,You get a real fluorite crystal to compare to the crystals you grow and to add to your rock collection