Years ago, my husband went skiing with my older son (who was then about four or five) and to make the long lift rides fun, they talked to the equipment around them - chairlifts, lift towers, etc. Even better, the equipment talked back!
Well, it wasn't really the equipment talking. But my husband was good at pretending.
Since I wasn't there for this, I didn't know about it... until years later, when my husband repeated the game with my younger son. Hearing conversations between my child and the chairlift sparked my imagination immediately. I knew this game was destined to be a book!