A shocking experiment

Having learned a little about static electricity, Audrey went to the playground at Archbishop Howard this afternoon to run an experiment with it that she had selected for the school science fair. She had remembered that she sometimes gets zapped by static electricity after sliding down a slide, so she came up with the research question: Which kinds of clothes are best for making static electricity when going down a slide? Her hypothesis was that leggings would work best.

She brought several types of clothes to the playground, mostly cotton and polyester pants (including leggings). She put on each article of clothing (over shorts), slid down the slide, then touched Dada's arm to see if she felt no zap, a little zap, or a big zap, which she wrote down in her results sheet. 

She found that leggings did indeed make a big zap, but so did other clothes with legs (as opposed to shorts and socks). She concluded that it was because there's more clothing rubbing on the slide, which makes more static electricity.