I can attest that there were two such people, doing the same as adults, as Peter describes of his days. Preface from The Silk Roads –
As a child, one of my most prized possessions was a large map of the world. It was pinned on the wall by my bed, and I would stare at it every night before I went to sleep. Before long, I had memorised the names and locations of all the countries, noting their capital cities, as well as the oceans and seas, and the rivers that flowed in to them; the names of major mountain ranges and deserts, written in urgent italics, thrilled with adventure and danger.