We cracked the secret to making your favorite concoctions glow in the dark! Glow Powder is a fine powder called zinc sulfide that glows an eerie green light when the lights go off. Our team of creative teachers packed the included activity guide with a bunch of great ideas… from glowing alien blobs to glow-in-the-dark putty. When the lights go off, most people think that it's time to go to bed. The after dark scientist knows that when it's dark, everything comes alive with an eerie glow! Try using our Glow Powder for your own activities and ideas. It's perfect for a new twist on Halloween Jack-o-Lanterns and other glow in the dark crafts. Adult supervision is required with all chemicals.