I've heard all the usual ones, paper round, leaflets, baby sitting, lemonade stand ect. But none of them intrest me has anyone got an idea that is different and a 12 year old can do. I live in the UK so selling USA flags won't work.
try walking down to the local shops thay might whant a shelf stacker or a bag packer dont go to all the big brand names because thay probly will not take you on or you local frute and vedg shop or pet shop i worked in a pet shop when i was 12 - 13 its not to bad because you are with animals x hope this helps good luck x