The work is based on the theme of fairy tales with planning ideas.

Perhaps we were pretty big boys - Jack and I. In fact, I'm afraid we were so big that we haven't grown much since. But Ollie was a boy, anyhow; he couldn't have been more than a dozen years old, and we looked upon him as being a very small boy indeed; though when folks saw us starting off, some of them seemed to think that we were as boyish as he, because, they said, it was such a foolish thing to do; and in some way, I'm sure I don't know how, boys have got the reputation of always doing foolish things. "They're three of a kind," said Grandpa Oldberry, as he watched us weigh anchor; "their parents oughter be sent fer." Well, it's hard to decide where to begin this true history. We didn't keep any log on this voyage of the Rattletrap. But I'll certainly have to go back of the time when Grandpa Oldberry expressed his opinion; and perhaps I ought to explain how we happened to be in that particular port