Do you have any of those photo booths at the mall? The ones where they print out 4 pictures. Take the boys for icecream and get their pictures, then cut htem in half and frame them alike. My boys did this with their best friend - BF's mother took the kids, we inded up with the goofy photo and I cut them and framed them. BF's mother says that is still his favorite picture in his room.
This can be done very inexpensively, too.
(What about Chuck E Cheese's "pencil" drawing pictures?)