Lots of good suggestions made already, is there such a thing in the States as restocking shelves at the local supermarket? Paper runs are likely obsolete these days as virtually everything is online and the demand for newspapers in black & white just isn't there. Another alternative for 'young' enthusiastic people wanting to earn money is being a
dish-pig, i.e. dish-washer-up-erer at a local eatery. These are popular starting places over here other than Brax's suggestion with starting at home with chores and various duties around the house. Parents are typically more generous when it comes to pay rates than actual employers too.