Taped some leftover glowsticks to the ceiling fan. Turned it on and was treated to spinning awesome. My niece and nephews were thrilled, my sister-in-law and half-brother thought it was pretty cool, especially once I started beatboxing a driving baseline.
I'm such a dork.
Try it with some Anaglyphic 3D glasses. Heck, doing anything with those is freaky.
PS: Don't wear them for extended periods outside.
PPS: Playing 16-32 bit era games with them is fun.