So webcams are quite fun, they take pictures, you can record videos, but what if you could take pictures of microscopic objects? This is a simple and reversible modification for a webcam which lets you take pictures of things far less than 1mm wide!
Step 1: The raw materials
You only need two things for this microscope:
1. A webcam with an unscrewable lens (I got a really cheap one for about £5 on ebay)
It is absolutely vital the webcam has an unscrewable lens, almost all do (and for most webcams this is actually the way you focus!).