My brother took the kids to an indoor rock climbing center. When we arrived my littlest took one look at the high walls and ropes and said "no thanks, not for me". We suggested he put a harness on just in case.
The next room was a bouldering room, and within a few minutes he was trying it out and getting right into it. He even tried clipping in and climbing up the big walls before we left. It's amazing what can be achieved when you have the right attitude.
