I think each of us has an alter-ego who (we believe) would have made a great spy, or some kind of super secret agent. If you're sitting at your computer reading this, I'm guessing you let go of this fantasy some time ago - That or your current assignment has you posing as a regular guy.
In this project secret agent meets DIY'er and comes up with very cool homemade infrared vision. This video tells you how to create your own night vision camera. All you need is a flashlight, red and blue cellophane, and a digital camera. If you have a camera from the 90's that's still kicking around waiting for its turn as a re-purposed creation that will do the trick. Otherwise use a Sony camera with night vision.
I'd like to take pictures of night animals, like this one of bats flying out of their cave. Or maybe I'd film a short spy clip just for fun. How will you use your infrared vision?