For many years I took my son to festivals, both with a ticket or just for the fringe. Broadstairs, Warwick & Whitby have terrific clubs and workshops for kids, & also have the added bonus of the beach (Whitby & Broadstairs) and the swimming pool at Warwick. I rarely spent much time in the concert venue at Broadstairs as it was totally unsuitable for children and was very claustrophobic. Alas by the time he was 12 he had grown out of kids events and there was not a lot for him so now he stays at home and I spend more time on the fringe or at performer orientated events without him. At least your daughter is musical Liz, she could get involved in workshops.