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!
Milk Art. All you need is milk, food coloring and dish soap. This year in Chemistry I got to test out this project, but my group did it wrong and it didn't come out right. I would love to try again and make a complete piece of art out of it. The colors flow however they want and you can't control it. It's art just the way it is made.