Little Hazel Wells finds it difficult to adjust to her new life with her brother not around; when she tries to run away from home, she finds out her weird neighbors, Cosmo and Wanda, are fairy godparents in disguise.
Hazel, Cosmo and Wanda must pass Wish Trials at the Fairy DMW or Jorgen Von Strangle will assign Hazel a new fairy; nervous about not fitting in with the other kids at school, Hazel wishes that she is friends with her teachers instead.
When Hazel wishes to meet a real dinosaur, Cosmo and Wanda bring a Baryonyx from the Cretaceous period to the present; Hazel wishes Jasmine was fearless but the wish goes awry when Jasmine's fears escape and run amok.
Hazel wishes her apartment building were a luxury hotel, but finds herself too busy running it to spend time with her friends; Hazel calls on the fairies to speed up time after her wish to become popular at school overwhelms her.
When Hazel tries to make Pudding Day at school fair for everyone, she accidentally starts a pudding apocalypse; when Hazel wishes her hair had spirit for a school contest, she finds it has more personality than she bargained for.
Cosmo and Wanda rewrite the laws of science in order to make Hazel's science fair project work; when Hazel's landlord goes missing, she solicits Cosmo and Wanda's help to get to the bottom of the case.
Hazel rewrites the book, when she wishes the main character from her favorite Manga graphic novel, into the real world; Hazel befriends a walking, talking dumpster named Danky after learning about humans' harmful effects on the environment.
Dev refuses to participate in Kindness Day at school, so Hazel summons a few intergalactic diplomats to keep the peace; Hazel must work with her nemesis, Dev, on a class project and discovers a softer side to the meanest kid in school.
After losing Hazel to Cosmo and Wanda during the Wish Trials, Cookie returns for revenge; fed up with Angela's work life imbalance, Hazel wishes she could be her mom's assistant in order to spend more time with her.
Dev's dad, tech magnate, Dale Dimmadome creates an app designed to track kids wish energy at the annual Founder's Day Festival, but Hazel is showing up as an anomaly thanks to Cosmo and Wanda.
When Hazel's Cosmo and Wanda fidget toys are confiscated at the Galax Institute, she pairs with a janitor to get them back; with Dev's new fairy granting wishes, Hazel and Dev battle it out dueling wish-style during a spooky night at the museum.
A trip to Patty Possum's Party Playground turns chilling when Hazel wishes an animatronic Patty Possum to life; Hazel must out-matchmake Cupid himself or her parents' memories will be erased forever.
Dev and Hazel wind up lost in Fairy World. Cosmo, Wanda, and Peri try to find them before Jorgen finds out; Hazel accidentally erases music from the earth when she awakens a rivalry.
Hazel and Antony enter a world of dirt bike racing and giant snakes when her wish sends them into a board game; Hazel finds herself in hot magma with a civilization of subterranean rock monsters.
When Vicky takes over Dev's birthday party as part of her personal money-making scheme, Hazel stages a Home Alone-style takedown to save the day. Cosmo, Wanda, and Peri discover Dev's dad has been investigating Hazel.
Hazel faces Mother Nature after her wish for unlimited French fries threatens the global supply of potatoes; after several paranormal incidents in the Wells Home, Marcus investigates.
Dev teams up with an infamous anti-fairy to give Hazel an epic run of bad luck; Hazel wishes for a do-over but finds herself trapped in a magical time-loop.
When Hazel wishes to be 13 to get into a movie, the fairy version of puberty hits her all at once; Hazel wishes to be a fairy for a day, but things go awry when her anti-fairy shows up.
When Hazel, Winn, and Jasmine fail a BFF compatibility test, Hazel makes a wish that lands them inside her mind; when Hazel wishes she didn't have a gap in her teeth, the Tooth Fairy fills her gap with an obnoxious talking tooth.
