Here's a project that I've had in my head for a long time, but probably wont get around to.
Step 1: buy a cheap walker on CL.
Step 2: Buy a plywood table top and some bracketry or a hinge from home depot.
Step 3: Attach table top to walker- Lots of options here for creativity!
Step 4: Enjoy your new folding table. It even has 2 wheels!