Assuming kids catch and spread the virus without sickening much, and that immunity among previously ill adults is robust, I would send my kids to a summer camp with immune counselors and lots of spit swapping (bobbing for apples, spin the bottle, being kids).

Any plausible way to use the mildness of illness in kids to develop herd immunity more quickly, rather than having them return home to parents and grandparents every day with deadly sniffles from the viral reservoir that is school?