DIY Hanging vases made from used light bulbs.
There is no "how-to" info but I think you just snip off the metal end and knock out the filament. I am going to try this with the next bulb I replace. Would be beautiful on my porch this summer.
light bulb water gardens How fun would this be to observe in a science center? I imagine using the plastic novelty light bulb jars, you can find for promotional use, as to not worry about the chance of broken glass.