Here’s a nice little how-to on making 3d pop-out versions of your photographs using two copies of the photo and foam-core.

I ran across this link on FinkBuilt: A very cool slot car track (SlotForum).

I had an idea a while back that required a little more electronics knowledge than I have. This instructables entry solves the electronics portion of my idea - now I need to dig it back up and try it out.