[Footballdude]

I am working on that set as well, along with 60+ other sets at the same time, but I don't know of any cards in the set that are particularly hard to find. Right now I am 42 cards short, and the hardest thing for me will be being able to afford the Sayers and Butkus RC's.

I really like all of the Philadelphia sets because of their straightforward designs.

Good luck in your effort. I imagine collecting cards with your son is very fulfilling and makes the hobby that much more enjoyable.