Tally Tuttle turns into a turtle
(Book)

Tally Tuttle, a shy, new-in-town second-grader, magically transforms into a turtle on the first day of school, and in order to transform back to herself she must learn how to come out of her shell both literally and figuratively. Includes ten fun facts about painted turtles.

"It's Tally Tuttle's first day of second grade, and she's so nervous that she feels like she ate butterflies for breakfast! On top of moving to a new town and new school where she doesn't know anyone, everyone starts teasing her when her full name, Tallulah, is revealed during roll call. She just wishes she could retreat into a shell... Then, all of a sudden, the desks and her classmates around her seem enormous, and Tally is shell-shocked to discover that she's actually turned into a turtle! She'd heard that Mrs. Norrell's class was special, but she hadn't expected this. Tally likes having a shell to hide in, but there are other parts of turtle life--like the fear of being stepped on--that aren't exactly ideal. And once she's tired of hiding, how can she change back into a girl? Tally will have to forge her own transformation back to herself and come out of her shell--both literally and figuratively!"--

Ages 6 to 9.,Amulet Books.