My DS6, for instance, is interested in parkour gymnastics. It involves a lot of free running and environmental movement, which has been a bridge for him into physics. He'll try out a new move, then sit back and assess how the result aligns with different rules he knows (he's quite into Newtonian physics now). When he sees results from his knowledge, it fuels a strong desire to learn more.
This brought back memories of years of coaching the MIT Ballroom Dance Team. There is nothing like being able to tell a group of students, "As you swing your leg through here, allow the standing leg to pivot, so that the momentum is converted to rotational energy and to rise as you reach the end of the beat," and having all of them nod and execute a lovely feather step. Obviously this doesn't work for all dancers, but it was a beautiful way to teach a bunch of engineers to dance.
