Been taking ours since they were 6 and 10 and no regrets. Did one year without (messy one) and missed having them there. This year they will be 20, 24, we have a family allnighter planned at block 9 if us oldies can manage it π
Some of our best shared memories are at the festival. They always rated glasto above Christmas, covered it in topics at school and we are so glad they got to experience the festival from a young age. Youngest has gone on to study global sustainability in further education and we think this is linked to glastonbury opening young eyes.
I think its best once they can remember personally, I couldn't handle babies there myself but fair play to those that can. kidz field is amazing for the wee ones.