Tutu Twirling Ballerina (Paperback) (ISBN-13: 9780998042435)

Scilie (Sigh-lee) G. Powers explores the world of science and engineering through her favorite things. When Scilie wears her magic safety glasses, she is transported to a new world where her dolls come to life to teach the lessons. Tutu Twirling Ballerina explains the gear, a basic building block of mechanical engineering, as demonstrated by a ballerina music box.