Glow in the Dark Gak
As Halloween is approaching, we have updated this activity to include a more cost-effective way to have gak "glow in the dark". Gak, more commonly known as slime, is something almost everyone has made, but here are some instructions on how to make glow-in-the-dark gak. At the end of the instructions, explore some of the science behind gak and glow-in-the-dark toys. For this experiment, you will need: PVA glue - we find that Elmer's school glue works best Borax Hand Soap Water Measuring cups and spoons spoons for mixing 2 plastic containers for mixing Airtight container for storage Green phosphorescent pigment (the most affordable we found is at www.douglasandsturgess.com) . Alternatively, use highlighter markers to make slime glow under ultraviolet (UV) light or a blacklight (try with clear glue) Add 1/4 water and 1 tsp. of borax to one container. Add 1/4 cup water and 1/4 cup glue to a second container. Make sure that...