Invent a super secret handshake for you and your child. Take turns adding a step (like shaking twice). Repeat it until you both have it down. Now change one of the steps. How do they respond? Go back and forth between the new and old way.
See what your child is learning
Creating and learning a super secret handshake helps your child remember and do what is needed to achieve a goal. This is a big step in learning self-control.