In reply to Roadrunner5:
we've got a Sunday morning informal really young kids session on at the moment, we just put loads of extra holds on the wall for the morning, it's been great for the wall and we've routinely got a really busy early Sunday crowd. Only challenge will be when they get to kids clubs age and are all capable of leading 8A...
What I've noticed from watching is that the kids who get into it are the ones who are just encouraged to have a sort of climbing themed play, maybe rescue the teddy type games and stuff. The kids who have been introduced to following specific coloured problems and routes have definitely not held interest as well, think that's held true till age 5 or 6.