For a while parents shipped their children USPS Parcel Post because it was cheaper than train fare. https://www.smithsonianmag.com/smart-news/brief-history-chi

For a while parents shipped their children USPS Parcel Post because it was cheaper than train fare. https://www.smithsonianmag.com/smart-news/brief-history-children-sent-through-mail-180959372/ https://www.smithsonianmag.com/smart-news/brief-history-chil...