We decided to make a miniature belt sander. This is something most folks are familiar with. It started out as a nonfunctioning unit but one of the other guys suggested we make it actually work so I added a motor and a battery pack.
The company had a going away party before we had it completed so one of the other guys threw together a piece of rusty pipe and a probe. He also spelled his name wrong on the plaque. He didn't look real thrilled with it but he smiled anyway.
We gave him our real gift at our department going away party.
Here is the design I came up with.