I Wonder Why Zippers Have Teeth
Subtitle: And Other Questions About Inventions (I Wonder Why)
Publisher: Kingfisher
Published: August 22, 2003
Language: eng
Format: Paperback
Number of pages: 32
ISBN-13: 9780753456651
Subjects: Questions and answers; Juvenile literature; Juvenile General And Reference Works; Juvenile Science (General); Juvenile Nonfiction; Children's Books/Ages 4-8 Nonfiction; Children: Grades 1-2; Technology - How Things Work/Are Made; Miscellanea; Juvenile Nonfiction / Science & Technology / How Things Work; Inventions
First sentence: Inventors try to solve problems.