They are unsupervised boys. and the older one probably likes you and since he is probably watching his brother he can use him for an excuse as well. Ask them questions. Kids hate that. Ask them why they are not playing with boys their age. Ask them if they have homework. Where are your parents. Don't you have any video games to keep you occupied...what are you bored? Don't you realize how much homework I have being so much older than you? You may get to the reason why they are stalking you, or just wanting to hang out.