I found this idea in a magazine while waiting at the Doctor's office the other day.
Take a christmas ornament and glue it on the inside of the lid of a jar.
Fill the jar with distilled water, 2t glycerine, 1/2t detergent, and glitter.
I didn't have ornaments to use, so we made a tree by stringing beads on a wire and coiling it into a cone.
The glue should be water proof. The glue I used wasn't.