Katie can’t wait for the school science fair. But when she hears that a sixth-grader named Selena is using her pet mice as part of a science experiment, Katie does her best to put a stop to it. When she turns into Selena on the day of the fair, she gets her chance to set the mice free. What a disaster! How will Katie eek her way out of this one?

Becky is taking riding lessons at the Cherrydale Stables. That's not news to Katie or her friends: In fact, they are sick of hearing about horses and sick of hearing Becky brag about what a great rider she is. Still, Katie convinces everyone to go to the horse show where Becky wins a medal in the first event, showmanship. The event looks pretty easy. However, Katie gets to see what it's like from the horse's perspective when suddenly she's switcherooed...

Katie has plans to go to Suzanne's all-girl sleepover party, but Jeremy wants her to ride the hot new rollercoaster. Annoyed, Jeremy and the other boys from Class 3A decide that all girls have cooties. When Katie finds herself in Jeremy's shoes-literally-she tries to reunite the boys and girls. Will Katie's plan work? Or will it just be one big mess?

Katie, who has never cooked a thing alone, switches into Louie the chef at a pizza parlor sponsoring a pizza-eating contest.

Katie agrees to be a buddy for the new girl in class even though her best friend Suzanne does not approve.

When fourth-grade Katie turns into her unfair track coach, she gives all the members of the team a chance to compete, including the slowest runner in her class.

Katie magically turns into her father right before he is set to appear on his favorite television game show, but unfortunately she cannot answer a single question.

Katie is an ordinary third-grader–except for one very extraordinary problem! She accidentally wished on a shooting star to be anyone but herself. But what Katie soon learns is that wishes really do come true–and in the strangest ways . . .

Oh, Baby!
When Katie turns into her best friend Suzanne’s baby sister, Heather, things are bad enough. But when Katie, as Heather, speaks to Suzanne, Suzanne thinks that her baby...

Katie is an ordinary third-grader—except for one very extraordinary problem! She accidentally wished on a shooting star to be anyone but herself. But what Katie soon learns is that wishes really do come true—and in the strangest ways.
I Hate Rules!
Katie is sick of her school’s rules. But when she turns into the principal and announces that there are no rules, she creates a great big mess! Will Katie be able...

Katie is an ordinary third-grader–except for one very extraordinary problem! She accidentally wished on a shooting star to be anyone but herself. But what Katie soon learns is that wishes really do come true–and in the strangest ways . . .
Any Way You Slice It
Katie offers to help the owner of her favorite pizza shop run a pizza-eating contest. But, when Katie turns into Louie the chef, how will the pizzas for the contest...