Oh, Elementary. You and your silly little observations. Aren't ordinary people adorable?<<---I don't even want to watch Elementary after BBC Sherlock.<<< pffffft what kind of scarf is that anyway elementary?
Ed Dancing raisins activities. Lots of fun experiments. I have done this experiment, and seen the entire class become silent out of curiosity. It is a great engagement piece for a lesson, and it can be hands on if you ask for volunteers!