Kids can get Covid, there are even a few (0-9 year olds) who have died from it in Sweden.

In Sweden there is now the policies from the spring to keep kids at home if they have an symtoms and two extra days after symtoms (and the adult that doesn't go to work gets 80% of lost income), and in addition some regions are now recommending and providing testing on kids from 10 years and up, mainly so they can get back to school without the two extra days if it isn't Covid. Teachers have not been more ill then the average population, so it seems to be working.