You have any old expired disposable cameras you found while cleaning? Maybe you got one to make a slave flash or taser, what to do with the rest of it? Since you have to take apart the camera to get the flash out, why not make a cheap macro lens that takes great pictures!
Here is how to get a great macro lens in five easy steps! (one of them's looking at cool pictures)
Step 1: Supplies
You will need a disposable camera, screwdriver, and something to make the lens stick like double sided tape or the stuff I found that makes stuff tacky.