In reply to pancakeandchips:
I climb regularly at TCA as an adult but think it's pretty poor actually for a 5 year old (I have a 5 and 3 year old), lots of it is steep and very few problems where they can reach between the holds.
Bloc is a bit better, more slabby/vertical, some circuits for shorties, and a small section focused on kids.
Redpoint has a bouldering section which is great for kids with some easy traversing and a children's tunnel inside the wall. There's not loads of it but it's plenty for a visit. There's loads of easy top roping if you have a childs harness and plan to do that.