I spotted this on MAKE Magazine this morning. Instructables has step-by-step instructions for a DIY Ferret Wheelchair. <http://www.instructables.com/id/The-FerretMobile-DIY-Ferret-Wheelchair/> I also noticed that they had instructions for a Dachshund wheelchair, which you might be able to adapt to a ferret, although I'm not sure how well the harness in that design would work. <http://www.instructables.com/id/Dachshund-wheelchair/> They also had instructions for making hammocks. <http://www.instructables.com/id/How-to-make-a-cage-hammock/> There's probably more but that's all of the time I had. Sydney Harper [Posted in FML 6421]