K's postcards arrived in the mail and he is loving them. He was running around the house yelling, "mail mail mail!" Each week K will receive 4-5 postcards in the mail from all different kids and he will send 4-5 out to other kids. The kids in the swap range from 15months - 8years old. I think I'm going to set up a little mailbox in the house where he can keep them and play with them.