Same child labor laws pertain to the state fair as any other place of business
Probley 18
It depends on the owner of the game and the maturity of the youth. If one turns you down, ask another. You can also work independently as a "go for", getting drinks and food for workers in exchange for tips during busy periods. Help with set up and tear down are also good options.
I think you have to be at least 16.
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