Are you alone with Jesus while you are playing guitars and singing? I don’t have any problem with that, but as much as I enjoy peaceful guitar music and worshipful singing, I would not want to hear it while I was trying to adore the Lord during that precious hour.
We have a perpetual Adoration Chapel at our parish, and for the most part, it has a crowd of adorers all the time. I’ve heard that at 2:00 A.M. and such hours, it has only the one assigned adorer, but I assume no children are there at 2:00 A.M.
I really don’t mind what children do in Adoration as long as they are quiet, but I think that rather than long periods of Adoration that allows them enough time to color a picture, it would be better to visit Jesus with children for just a few minutes, and concentrate on Him entirely, then leave. This way, the children associate the Chapel with a pleasant time with Jesus, rather than a prolonged period of boredom while Mommy or Daddy sits silent. As the children grow older, increase the amount of time.
One of the families in our church has seventeen children, and this seems to be their rule. All of their children, from older teens to young toddlers, enter the Adoration Chapel and are quiet and prayerful. Usually within a few minutes, the younger children begin to trickle out the door (in the company of older siblings), and within ten minutes, only the oldest children and mom or dad is still in the Chapl. (There is a huge playground next to the Chapel.)