Back when I first started writing full time, I spent a long, cold winter working in an uninsulated garage. There was no way to keep the garage warm, no matter what I tried and I found that my fingers would cramp up and get stiff making typing harder. Working with gloves was far from ideal and I would have loved to have a mouse that heated up at the time.
I think that early spring may be the wrong time to introduce new heat therapy peripherals, but that is happening anyway. ValueRays has a selection of infrared heat therapy computer workstation peripherals for people with arthritis who need pain relief.