Get a football or similar sized ball and start by standing behind it. Then tap the ball with the sole of your right foot (don't stand on the ball!) before hopping onto your right foot and tapping the ball with the sole of your left foot. Continue this for 30 seconds and see how many times you can tap the ball. Aim to keep the ball still.
Make it harder
Make it easier
If you would like to share your attempts at each challenge you can ask the grown ups in your household to film you or take a photo of you doing the challenge and then send it in to Mr Thomas at firstname.lastname@example.org along with your score and possibly a write up about how the challenge went in your household.