I have an idea.
Why doesn't someone invent a sort of hovercraft to sit on that zooms into place at specified times during the day, then zooms itself over to the sink for a quick rinse off, then into the cabinet until the next meal? Brilliant, I know. If only because if you didn't come for dinner when called, you might not have a seat when you finally get around to showing up. Hehehe.
Mom wouldn't have to sweep or mop around 36+ legs three times a day. Nobody could tip them over, or climb onto them to reach things they shouldn't. They would automatically adjust for height. I'm telling you, the American household would never be the same.