Based on a Dream: Specifically, those of Robert Rodriguez's son Racer, as well as some drawings Racer had done.
Box Office Bomb: Subverted. While domestically it made $39,177,541 of its $50 million budget, its worldwide takings got it just over $30 million more for a worldwide final tally of $69,425,966.
What Could Have Been: Around the same time that she auditioned to play Lilly in Hannah Montana, a young Miley Cyrus auditioned for the role of Lavagirl (she states this in her autobiography, Miles To Go). Although she did not get the part, she met and became close friends with Taylor Lautner, a friendship that's lasted to this day.