I gotta go with Yankeelvr's advice. Your being there and helping out in a positive mode is your gift to them. Nothing else is need IMHO.
I like your attitude though. You obviously love the game and your willingness to go back and help out illustrates this. Nice job!
( Okkkkk,..but if you really think you must get them something,....Costco and I beleieve Walmart, makes a giant bucket of sunflower seeds, big enough that the lid of the bucket is made to be used as a seat to sit on! I think it runs for like $20. Kind of a fun idea, but again I really do think your helping out is all that is truely needed.
)