Had an old mouse. Had a broken mechanical clock. So what do I do with them?
I cut the body of the mouse in half down to but not including the base and removed the rear part. When chopping up a mouse body, if you want to use the original buttons, it's important not to take off too much from the rear. The buttons attach well back in the body.
For the front of the mouse, I painted it copper, then did the middle button in gold for contrast. The remaining section of mouse behind the buttons is upholstered with a scrap of leather, while the sides are veneered with wood. The key is something I picked up at the craft store.
The rear is the workings of the old clock, cut to fit with a Dremmel and decorated with a variety of additional and repositioned gears and other components.
One of the nice things about this one is that when it's plugged in, the red glow of the LED is visible from the rear, but there's not a glare because it has to reflect through several layers of gears and structural bits.