In reply to karinbradbury: Tricky one because of her age and many walls' (understandable) caution to younger users but try this:
You should be able to sign your daughter in as a guest at most walls and have her belay you. 'Guest' is not the same thing as 'Novice' so there shouldn't be any restriction on whether or not she can belay unsupervised. I suppose this would depend on each wall's Conditions of Use so give them a scan online ahead of time if possible.
This is something we often do to get around high registration/sign-up fees for one-time visits at walls, but then we're all well over 18. I'm not sure how much this is a factor.