Wendy wishes her wand was more powerful so she could do bigger and better things with it, so she asks Mother Nature for help. Mother Nature uses a machine to make Wendy's wand bigger, but Wendy also becomes a giant.
As a giant, Wendy learns that her magic has unintended side effects. When she tries to stop a hurricane that is too much for her powers, Mother Nature brings her safely home and returns her to normal size. She leaves Wendy's giant broom and wand at the bottom of the sea for King Neptune and mermaids, but replaces them with correctly sized versions for Wendy.