Have you seen the glow in the dark jars all over the internet? For a fun activity to do for New Year's eve we made some of these glow jars. They worked extremely well and looked so pretty in the dark. I won't give credit for the idea to anyone in particular. There are too many sites describing how to make these all over the internet now and I can remember them from way back in the 80s.
They would be a pretty decoration for a night time party as long as they were hung in a safe spot.