... Foremost children have no business in a hardhat area. How can you put a helmet on a minor and put them in an area where there are potentially falling rocks, or above other people when they could dislodge loose rocks?
...To climb means there are grave responsibilities and grave decisions that can effect people permanently, decisions that only adults should be allowed to make.
There may be some things children can do, but it should be limited. Take them to Great Adventure.
That being said, didn't you take your son Josh up onto El Cap's Zodiac when he was 13 as you posted last season? How old were your children when you took them for their very first climbs?