The games' core idea is the characters are adolescents in a Little Prince universe on a problem solving pilgrimage answering letters they received. From there the two games diverge thematically. In Pilgrims, the characters eventually return to the titular Temple at the center of the Universe and discover destinies shaped by their experiences. In Fate, the Flying Temple is gone and the characters steward a young Dragon on their pilgrimage. Each player defines the Dragon with an Aspect and a new Aspect after each letter. Shaping the future Flying Temple through their escapades.
Fate Codex on Patreon. If you're looking for a game to introduce Fate to kids pr the young at heart, then Do: Fate of the Flying Temple is worth picking up.