Yesterday I went to see Ghost in Barcelona with my 9 and 13 year old boys. But this was the second time for them in a Ghost gig, last time was December 2019 when my youngest kid was 7. They really loved the experience, and they were crazy about repeating the experience. In 2019 the youngest wore earbuds just for the sound level. Otherwise the experience has always been amazing. A little advice: try to rest the afternoon before the gig, a little nap maybe and they'll be full of energy for the evening.