black light


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The Invisible Secret Message That Glows in the Dark

Reveal invisible secret messages and drawings under a black light with a spooky homemade Halloween projector. These handheld projectors are perfect for puppet shows, lighting up while trick or treating, flashing messages in the dark to your…

Sick Science! Summer Camp – Make Your Own Firefly Glow Jars & Glowing Drinks

By Blog Editor: Susan Wells In Denver, our dry heat keeps many bugs from living amongst us. Usually, this isn't such a bad thing. We don't miss the chiggers, the cockroaches, or other bugs found in other parts of the United States. We do miss…
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Glowing Halloween Party Ideas

Halloween is our favorite holiday at the Spangler labs. Science and Halloween go hand in hand and there is nothing better than turning off the lights and bringing out spooky, glowing science to make all of the kids ooh and ahh. Whether you…