Angelina at the Palace by Katharine Holabird
Angelina and Henry visit the Royal Palace of Mouseland to help teach the princesses a special ballet for the King and Queen's wedding anniversary. To Angelina's horror, Miss Lilly is confiined to her bed with a terrible cold and Angelina is asked to be in charge. When she finds the 'perfect' princesses squabbling in the ballroom, she realizes they are just like other mouselings and loses her nerves. She soon teaches them to be magic fairies and the ballet is a great success.