The arrival of a barnstorming pilot and his mechanic brings excitement and near disaster to Willsford. The pair want to organise rides for the locals and for that they need two capable assistants. Molly and Pixie are excited because it beckons not only a free flight as a reward, but also the coveted Girl Guide aviator badge. But others also want this badge. Then there's Jimmy, who also gets hired only to find himself having to compete against the girls for the promised free ride.

A remark about rabbits and 'multiplication' exposes Pixie's lack of knowledge about sexual reproduction. Unfortunately, Aunt Vera does not want to explain to her the facts of life and suggests she talk to grandma but she will only speak in riddles. But then Pixie discovers a book with the promising title "All About Nature" and hopes it will shed some light on the matter.