Do any of your kids meet this description or anything near it, or are they talented physically?
My daughter couldn't connect her foot with a ball to play soccer and wasn't very talented physically as a little girl. She rocked at rock climbing - enough to have several climbing gear companies sponsoring her by her senior year.
I'd highly recommend indoor gym climbing for kids who aren't as talented or physically adept. It's just you putting your feet on holds, hands on holds, and then standing up and doing it again. It's physically challenging and exhausting but not outside the reach of anyone. I'm terrified of heights and have even started climbing myself.