An excellent idea: Give school kids stand-up desks
I use one now. On all of my shows or segments (video or radio) I am standing at my desk. I have a bar stool for times when I am tired. There is a period of adjustment but if you have to be at a computer for hours a day, standing is better than sitting.
(You don't need a fancy, expensive set-up. Just get some bed risers and stick them under your desk legs. You'll have a stand-up desk for less than $10. Get a bar stool for when you're breaking into it or just feeling lazy.)