That's what so many parents found out during the pandemic. They'd finish the entire week's worth of government school assignments in a couple of hours and then wonder what the teachers were spending the rest of the time on.

From what I hear, homeschooling can be done in a fraction of the time. 

Aardvark

AskSN

What are children doing at too young of an age?

Yeah, basically internet stuff.

I'll throw school into the mix, though. I think kids should mostly be having fun and playing, until later in their development. It takes so much less time to learn stuff later that early education is mostly pointless.