A plank is an easy ab workout to do at home. Just start in a push-up position, then bend your elbows and rest your forearms flat on the ground. Then, flex your stomach muscles and hold! For an easier version of this exercise, start from your knees. Make sure your back stays flat. You can do these for 20 seconds or until you get tired.

The plank is performed on the forearms and toes with the body making a straight line from the head to the heels. Elbows should be directly underneath the shoulders. Have the children start just holding this position for 10 seconds. As they develop strength, work toward increasing the length of time to one minute.