I've just commented on it. We've met before from "the other side" :)
I think some festivals are fab for kids. I wouldn't be taking my dd to Leeds, V or Glasto just yet but that's for my own selfish reasoning. When I go to Glasto I want to lie in the sun (hopeful), drink cider, listen to great music, go and join in in the Healing Fields and not have a care in the world. I also want to party til 3am, dance my tits off and get up at 11 just in time to start all over again. NOT possible with kids in tow.
So, this year we're trying Beautiful Days as our dd's first festival. It got fantastic reviews last year, isn't as expensive, and we all love The Levellers. There are some fab alternative bands playing, loads for the kids to do, and fingers crossed the weather might have improved by then!