Thank you, everyone, for your ideas and input. I will be making a trip to the hardware store soon! :D I have also found the legs that are used on folding tables, but they are not tall enough. Of course, I could boost them up easily enough. It all depends on cost - if I go with a door or sheet of plywood and if I use legs or cabinets. I would really like to use cabinets - I'll be checking sources for used ones. Thanks for the advice on batting and covering material, it is so wonderful to have this source to rely on for excellent ideas and advice.