If he's only ten I'd say keep fronting him and let him pocket all of his earnings. It'll teach him to save and by the times he's 15/16 he'll have a nice savings account and an actual job that can take care of his extra curriculars. Or.maybe be able to buy himself a car or something.
Might even be good to put it into some long term investments in his name. He can start feeding it himself when he's a little older, and by the time hes in his 20s hell be way ahead of his counterparts.
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