BLACKLIGHT JELLO SHOTS They're a little bitter because of the quinine in the tonic water. You could easily swap Gin for the the Vodka, and have something close to a fruity Gin & Tonic. You must have a blacklight for these to glow.
Store bought items like these cookies sticks embellished with a little white chocolate candy coating and Valentines sprinkles, or any holiday color/theme. These would be a yummy alternative to Pretzel Rods.
How to make glow-in-the-dark ice! I opened up a bottle of tonic water, poured it into an ice cube tray, and stuck it in the freezer. Tonic water glows vivid bright blue under a black light. Now you need a black light to see it glow.