Today, he got in nine or ten jumps backwards in a row. He's stoked. Then, of course, he began getting tired, and started getting only eight, or seve, and of course he was disappointed.
Have been trying to teach him that when his body gets tired, he goes off the top of his performance, and when he gets too tired, he gets grouchy and disappointed and stands a better chance of hurting himself. So I made him put the jumprope down and do something else for ten minutes.
This, hopefully, should work.