We have covered a couple of videos of walking tables in the past. They can be moved around with a simple push. There are not too many places that sell these walking tables. The good news is you can make your own. boston09 has put together a guide that shows you what it takes to build your own walking table.
You are going to need some pine wood, bolts, nuts, a drill, pliers, and a few other tools to complete this project. This guide shows you how to get started.