Theresa Vilsmaier, who plays Mona Egerland in this movie, is the daughter of Joseph Vilsmaier, who directed Charlie & Louise - Das doppelte Lottchen (1994), which is another adaptation of a novel by Erich Kästner. Kästner wrote "Das fliegende Klassenzimmer", the source for this movie.
Over a thousand children auditioned for the film.
After Pünktchen und Anton (1999) and Emil und die Detektive (2001) it is the third German cinematic modernization of a novel by Erich Kästner within 5 years. Also Franziska Buch was working on the script for this movie and for Emil und die Detektive (2001).