Brown University study on mask wearing
Mean IQs for children age 3 months to 3 years old dropped from 100 before the pandemic to 79 during it.
It seems to me you’d want kids exposed to COVID at a young age so they’ll have immunity going forward. I raised my kids before there was a vaccination for chicken pox. Parents would often expose their kids to other kids who had chicken pox. You knew they were going to get it sometime - and the disease is worse if you get it when you’re older.