Love this idea! I would have more than one glow stick on hand in case one doesn't put out enough glow. I would also put the glow sticks in sealed plastic baggies for safety in case they opened up. This site has several good ideas for Halloween.
Cover plastic cups in fabric, attach to string lights! What a great idea to use all the yards of fabric pieces and a lot of cups on a string of lights. I can see my granddarlings helping me on this project