Author(s): Rachel Grack

Technology | 5-7 years | 9-11 years

This book for elementary readers describes the sequence of inventions that brought us from outdoor cesspits to today's smart toilets, complete with customized user settings. Engaging photos and a running timeline illustrate important ideas and inventions that have changed the way we dispose of our waste. A table of contents, glossary, further resources, and an index are included.