The last information I've seen I had still seems to suggest serious cases among children are, proportionate to infection numbers, pretty low. Its just that now many more children are getting infected, so the overall number of really sick children is much, much higher.
So, CNN this morning is reporting that in the US at the moment, 26.8% of weekly new cases are children.
That the kids may be not having quite so bad a time with the disease is nice, but as they get sick they still represent a large reservoir of the virus - so while the kids won't die, people around them will.