There were some studies released that coronavirus doesn't affect children the way it does adults and that potentially, infected children might not be transmissible to adults. With that being said, there was an outbreak of some sort of COVID related syndrome that affected 50 children, but they're treatable. I think we'll probably be able to open up schools sooner than people think.
As far as concerts goes, it's a wrap. You're not going to see concerts until 2021 at the earliest and many of the small business venues that host these events are going to have to close as a result.
It might not affect children in a very harmful way but they do seem to act as contagious vectors and they would of course have to be kept away from their grandparents (another sad event).
I wish 2021 would be a realistic target for a return to normality but I don't see it so close.