If it's going to be broken, have a shot battery, or be useless in 2 years it doesn't matter which of those happens, I am not willing to spend >$200 initially and then a monthly fee on it.
If I needed to track my kids' locations, I'd give them each an Airtag. $20ish and free tracking. I mind much less if they destroy/lose a $20 thing with a replaceable battery.
You will wish it was lost.