I came across this video on Youtube and couldn't help but think while I was watching it that this would be cool for photographing butterflies and caterpillars up close. It was made using a "Cellscope" that fits onto a cell phone to turn the camera into a microscope. It can photograph blood cells.

The phone used for the video has a better camera than mine though. It's a Nokia N8 with a 12mp camera. It shows the Cellscope at the end of the video.

Here is a link that might be useful: Dot cellscope video