Britain kept schools open after the first lock down. That now appears to have been a mistake. I expect they will close them now. In the US we are gearing up to put kids back in school in person despite the UK variant also spreading here. Worse yet is that vaccines haven't been tested in kids.
So as we sit here on a precipice contemplating about what to do, I do know that kids aged 12+ can get the monoclonal antibody treatments so if your kids develop symptoms get them tested so they can be treated.
Younger kids are still SOL I think...
From the CDC, you can turn the plot lines off and on on the left hand side. Focus on the growth rate in pediatric population. The trend in age group 0-4 is disturbing.