I can’t believe I went through science units on Chemistry and Physics before I found this site. It is truly a plethora of high-quality science stuff. Stunning is the word they use, and I agree. I can get lost in here. Seriously. Spongelab is a collection of animations, games, interactive lessons, lesson plans and pictures of everything science. After you register (it’s free), you can browse through the different categories and filter by what kind of content you’re looking for and level (beginner, intermediate, advanced) . You can save things you like into My List, then group them into My Lessons and assign them to My Class. Then there are points, badges, levels and credits. I haven’t really delved into those things because I keep getting lost in the content. This site is a Science Geek’s dream. You can build a plant cell. You can build a human body. You can see slugs mating. And all for FREE. Do yourself a favor, next rainy day while the kids are watching a movie, log in to Spongelab and get your geek on.