you can never go wrong with cholate and don't worry about being cool get like 3-4 huge bags of mini bars and hand like 4-5 out at a time little kids don't even care what they get its more content then quality
Wait, you can have a bunch of empty beer cans, pretend to finish it off, then toss it in their bag and just close the door.
Try to look like Carl from ATHF to get the right impression.