Overall, the microscope we use at work is fantastic, although photographing what you see through the eyepieces is extremely challenging without an attached camera. Removing the main viewing assembly was the best way to decide if we could build an adapter ourselves, but it also revealed these glorious barrel cams.
The Arc Mouse from Microsoft is an affordable, battery-powered mouse that folds up for portability. Unfortunately, I recently lost the little USB dongle that came with mine, rendering it useless. I've seen the inside of a mouse before, but was intrigued by the fact that you can turn this one off just by folding it, so I took it apart to find out how it works.