This book is part of a book series called Inventions That Changed the World .

This book has been graded for interest at 8-12 years.

There are 32 pages in this book. This book was published 2019 by Blastoff! Discovery .

Emily Oachs is a graduate of the University of Minnesota in the Twin Cities. She currently works as an editor at a Los Angeles-based educational company. In her spare time, she writes nonfiction books for elementary readers.