School, a school that accepts only the very best unicorns! There's only one problem: Milly isn't a unicorn . . . she's a donkey in a party hat. Milly is nervous about her secret, but she soon discovers she's got more in common with the other students than she thought! Now in board book format, First Day of Unicorn School will comfort and delight little ones as they try new things, make new friends, and discover what kind of unicorn they want to be!