Get a bath towel and lay it down flat on the floor. Place a throw line about 3 steps away from the towel. Throw a ball from the throw line to aim to hit the towel (the ball doesn't need to stay on the towel). Each time you hit the towel you fold it in half and return to the throw line to throw again. The challenge is how quickly can you fold the towel 5 times and hit the towel after the fifth fold.
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.