This is my new standing work station in the computer room. It consists of (from bottom to top) an anti-fatigue foam mat on the floor, a seven drawer craft cart (which is great for storing art materials), and on top is an adjustable tilt-top tray table. I modified the tray table. The top was made from pieced together bamboo and it warped almost immediately. So, I replaced it with 1/2 inch birch plywood.
I read that standing is better for you than sitting. I spend way too much time sitting and working on my iPad or drawing. I’ve been using it now for a week and I already notice that my legs feel stronger.