I Wonder Why Zippers Have Teeth
Subtitle: And Other Questions about Inventions (I Wonder Why (Paperback))
Publisher: Turtleback Books Distributed by Demco Media
Published: August 2003
Language: eng
Format: Unknown Binding
ISBN-13: 9780606310352
Subjects: Technology - How Things Work/Are Made; Children's Books/Ages 4-8 Nonfiction
First sentence: Inventors try to solve problems.