Two Laser Pointers (or other light sources)
- Target Superstore for about $12.00 a piece.
- 32 Envelopes for $10.00.
- Double the amount of gelatin in the recipe, this makes it very firm. Donít add sugar or coloring.
- Put wax-paper into the pan before filling with gelatin so you can remove the gelatin in one piece.
Converging and Diverging Lenses (optional)
- Edmund Scientific <www.scientificsonline.com>
- ranges from cheap to very expensive.