What was hillary not convinced that the elves made in the book afternoon of the elves?

In "Afternoon of the Elves" by Janet Taylor Lisle, Hillary is skeptical about the existence of the elves and the magical world that her friend, the imaginative and creative Sara-Kate, believes in. She struggles to reconcile her own practical mindset with the enchanting narratives that Sara-Kate shares. Hillary's doubts stem from her desire for a rational explanation and her concern about being seen as childish for believing in such fantasies. This tension highlights the theme of innocence versus growing up, as Hillary navigates her friendship with Sara-Kate.