I have previously posted (twice) about videos and demonstrations of science activities available on the web. There are more videos on YouTube of Oobleck. Check out:
- Non-Newtonian Egg Protector (Egg in a bag with oobleck)
- People in a pool of oobleck: Spanish TV ; Exploratorium
Another user, ScienceOnline, has also posted some interesting demonstrations. The lemon battery is featured on YouTube's front page right now. Enjoy!