Your family receives and sends mail letters, postcards, telegrams. You in the mailbox put Newspapers to magazines. And sometimes your address comes the parcel. Tell the child, as the post office and postmen. He really want to be a postman. Don't be lazy and play with the baby. Let all family members will prepare letters, parcels, etc. will say to the baby, who that is addressed, and put him in a bag. And he will pass the mail. You can also post Newspapers and magazines - each what he wrote.