"Cover a light bulb with a doily and spray paint it. The light will shine the pattern onto the walls." I don't know how I feel about flammable spray paint on a hot lightbulb. Maybe spray paint them silver and use them as non-light decoration?
3 Ways to Cut Glass Bottles
How To Cut Glass Bottles - Step by Step Tutorial for Bottle Cutting at Home for DIY Projects and Home Decor Crafts
DIY: Lace Light Bulbs - Spray paint a doily onto a light bulb or use a silver pen and draw your own designs. When the light shines through, it will cast a beautiful pattern on your walls. You could use any color spray paint
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.