We made eggs to decorate the light above our dining room table, just in time for Pascha - or Easter. Basically, we used this tutorial:http://www.makeandtakes.com/glue-yarn-ball-tutorial, but instead of using round balloons, we bought water balloons. I poured half a cup of Elmer's school glue into an old plastic container and half a cup of water and then measured about 6-7 yards of yarn (I used 100% cotton yarn Sugar n Cream) for each one, and set the yarn in the container to soak up the gluey stuff. Then, tied the end to the end of the balloon to anchor it (if it wasn't so slippery I'd omit this step, because getting the balloon out is hard, I ended up cutting the yarn and balloon off a few). Let it dry outside, in the sunshine, or inside hanging, with newspaper under, because it will drip. Then the next day, you can pop the balloon! And voila!
When I was young, we made these in elementary school and our class hung them on the school Christmas tree. I've also seen a BIG balloon wrapped in yarn, and then made as a "lamp shade." There are so many neat ideas out there!