Mice, it seems, are like buses: you wait for an age and two come along at once. Although this one - the Mouse Mouse - looks like it was hit by the bus…
It's a computer mouse inside a dead mouse and it is, quite frankly, disgusting. There's even an Instructables guide, so if taxidermy is your 'thing', knock yourself out.
"Warning: this project involves taxidermy, dremels, and sometimes graphic pictures of dead animals. While there are no guts in this tutorial, viewer discretion is still advised. If you are offended by this entire idea, please peruse the wallet contest or the laser cutter contest instead."
Thank goodness for the wallet contest… oh wait, is that a rat purse?