We live in a city with lots of parks nearby. They like to play a bit on the playground equipment and then want to race. They get lots of heart pumping exercise when they try to get to the finish line first. Today, for instance, one challenge involved having to touch a swing and go down the slide two times before coming back to the finish line. They were allowed to decide what order they wanted to complete the tasks and sometimes their strategy paid off even when the others ran just as fast.
