Last but not least...
Mice and wheels are fun. I try to have a wheel in my "weanling" bins... when I have a lot of mice in the weanling bin, I can sometimes have up to twenty young mice try to run on the rat-sized wheel I have in there. I've even left some of my mouse wheels set up outside cages... and have come into the mouse house to find up to three WILD mice running on the wheel! The main mouse in this cartoon, Mavra, was really the founding female who helped to create the mice in "mousedom".