How do you explain to a cat the concept of giving?

There is a rather large box in the living room right now where I am assembling the various items that will be sent out to some good little pets for Christmas. Problem is there is some (catnip) in there, and Cat #1 believes all of that addictive substance belongs to him and him alone.

I'm hoping I can get the gifts organized and shipped before his claws make it through double layers of cardboard, otherwise he might end up on Santa Paws naughty list!