The kids in my class were asking about doing a class science fair. I wouldn't want it to take more than a week or so to prepare. Any ideas for topics or websites we could go to in order to find ideas that would work? I was thinking kids would work in groups of two and do the experiments at school, so they would have to be done with supplies we actually have (limited!) and within a decent time frame... no sticking a plant in a closet to see what happens, or watching bread grow mold! Any thoughts???