I would give him all of my money and a hug. A big hug.
The thing people tend not to realize with these photos (and these situations) is that often these children (and women) are ‘pimped’ out. That is, they have a “boss” to whom they must pay the majority of their money at the end of the day. They are then given (based on the amount they raked in) barely enough for necessities.
When I was in India, I encountered children like these frequently, and I was always torn in half. Wary of the aid warnings I had received, but cognizant none the less of their suffering…. Often I would buy them a meal, or some candy, or something else edible that they would not have to turn in at the end of the day.