Nearly sixty years have passed between the time Lucius helped to steal Grandfather's car and the time he decides to tell us his childhood adventure story. "Even in 1905," he says, "the wilderness had retreated only twenty more miles; then two hundred miles by 1960" (2.7).
Lucius provides us with his views of the world as he would have witnessed everything back then as a child. This includes his childlike admiration for Boon, his shock regarding Miss Reba's brothel, and his excitement for collecting Pokémon Go characters.
Okay, just kidding. They weren't invented yet.
Lucius also tells us a bit about what he has learned in the time that has passed between his childhood years and his adult years. He seems to be a reliable narrator, revealing childlike wonder and amazement but also offering adult insights. "You see? I was doing the best I could. My trouble was, the tools I had to use. The innocence and ignorance" (3.36). In his narration, Lucius has the advantage of hindsight: he now understand the significance of the events that took place that memorable spring in 1905, even if at the time, a lot of it was over his head.