I love this site: http://www.exploratorium.edu/snacks/index.html
We found it pretty much by accident when the girls asked how pupils contract and dilate. They have a pretty cool and fairly easy experiment to demonstrate how it works, and the girls were just amazed, watching their pupils contract and dilate in a mirror. It was effective and intriguing. I think “Science Snacks” are a cute idea, and the title is appropriate: bite-sized, yummy morsels of science.
I also love the name exploratorium. I want my house to be one of those. Although the mini-version, I suppose. 🙂