Is there a for sure way to get money online, without paying any fees, or any downloads for kids/teens?

I really need extra money if me and my friend want to have our just the two of us day, we are going to the spa to get mani pedi's, facials, mages, and our makeup and hair done, then we're going to go shopping! it's going to be really fun, but if i want this dream to come tru, i need $ and fast!