Getting souped up for a new project on space exploration. One of the first places I looked was NOVA which has a ton of cool interactive projects and interviews.
Here is one to check out: Build a Rocket. Simple plug and play tool where you position rocket parts in the correct place. Once you plop them in, you get a short brief on the part's role. Good place to explore with your kids. Or you can use it as curriculum inspiration for a lesson on space rockets. Lots of science and technology connections such as Earth & Space and Engineering Design.