Play “Freeze! Focus!”
One of the best times to help your child improve his focus is when he isn’t supposed to be concentrating on anything. Try playing a round of the game of “Freeze! Focus!” When he’s least expecting it, say, “Freeze! Focus!” and have him freeze in place (start with 10 seconds and build your way up). When time is up, ask him to describe three things he saw while he was frozen. Eventually, you can put up signs around the house that list rules and chores and ask him to focus on them while he’s frozen.