I recently tried to DM for my son and his friends. One of his friends insisted he wanted to be a DM. I tried to gently encourage him to allow me to DM for them, and he would have much more fun as a player. Nope, he insisted, and like a good DM, I let him discover for himself why he was wrong. It was fun to be a player character, and they all learned a lot about running a game, so wins all around.