Obviously, the kids of, well, my age are suckers for reputation points and badges.
What are the good approaches as far as rewards for kids elementary school age if you want to incentivize them via gamification?
Star stickers seem a bit too 3-year-old (though may be if I call them rep points? :)
Incentivising via edible treats seems like a REALLY bad approach to me (they are humans, not puppies).
Incentivising via parental attention seems like a bad idea as well. Kids should never feel that parental attention is a thing to toy with.
Incentivising via toys stops working when they accumulate too many toys or parents run out of money. When you have 20 different matchstick cars, 21st one seems to be... meh.
So, what are the GOOD approaches?