We were doing some brain storming for An Post in the office today and found this. In1913 - After the American parcel post service was introduced, at least two children were sent by the service. With stamps attached to their clothing, the children rode with railway and city carriers to their destination. The Postmaster General quickly issued a regulation forbidding the sending of children in the mail after hearing of those examples.
We only wish we could still do it as we would have 3 little kids sent from America for their Auntie Sarah to hang out with.