Upcycled bulb stars - using old Christmas lights to make sun catchers. I came across a blog last year with the same concept, only using twine to tie them all together and secure them with glue. The project turned out beautifully. It's fun to mix and match bulbs to come to a truly unique "snowflake."
Also on these boards
Upcycled Recycled Lightbulb
beaded wire star - for next year's tree