I spent today volunteering at the SCS Youth Regionals for Washington and Alaska, which was held at my climbing gym. It was super-inspirational to watch all those young men and women just absolutely crush it on the wall. Climbing is such an awesome sport in general, but especially so for young people, and especially especially so for girls. It teaches them a level of self-confidence and self-reliance and creative problem solving that just cannot be beat.
They have no mass.
I hope that if we have kids they're as into it as I am. Obviously I know you can't guarantee that your kids will be into whatever you're into, but you sure can hope.