I stumbled across a really cool educational game for learning about physics. Here's a snippet: "How do physics laws affect amusement park ride design? You'll have a chance to find out by designing your own roller coaster."

I think most kids would really enjoy doing this one.

http://ca.pbslearningmedia.org/resource/59b12ee1-e6b7-4e21-bfdb-8fb6bf412f6f/59b12ee1-e6b7-4e21-bfdb-8fb6bf412f6f/