Ruben feels like he is the only kid without a bike. His friend Sergio reminds him that his birthday is coming, but Ruben knows that the kinds of birthday gifts he and Sergio receive are not the same. After all, when Ruben's mom sends him to Sonny's corner store for groceries, sometimes she doesn't have enough money for everything on the list. So when Ruben sees a dollar bill fall out of someone's purse, he picks it up and puts it in his pocket. But...