what has a leg on each side and one in the middle

a yard stick

A foot on each side and one in the middle.

To answer this riddle, we need to think about an object or creature that has two legs on each side and one leg in the middle. One possible answer to this riddle is a three-legged stool or a three-legged table.

These types of furniture usually have two legs on one side, two legs on the other side, and a single leg positioned in the middle for support.