On February 19, 1914, May Pierstorff, just short of her 6th birthday, was “mailed” from her parents’ home in Grangeville, Idaho to her grandparents’ house about 73 miles away for just 53-cents worth of stamps. May’s parents were taking advantage of parcel post service, which began just the year before.
53¢ in 1913 is worth $12.52 today.
The first child “mailed” in the U.S. was an unnamed boy in Batavia, Ohio in mid January 1913. The son of Mr. and Mrs. Jesse Beauge of Glen Este, Ohio was carried by Rural Free Delivery carrier Vernon Little to its grandmother, Mrs. Louis Beague about a mile away. The boy’s parents paid 15-cents for the stamps and even insured their son for $50.
link from the postal museum blog: http://postalmuseumblog.si.edu/2013/02/very-special-deliveries.html