I've been working with LEDs for some time now. I've created Cactus Lights, which are constructed from a knit black matrix that holds plastic lampshades (aka plastic cups) in place and lit with LEDs.
Right now I am experimenting with paper Chinese lanterns, plastic components and LEDs. I love this idea of lighting a colorful balloon. I can see a link from this balloon project to my lanterns. Hmmm..