Explains how the invention of the telephone changed the world and outlines concept-introducing scientific activities, including how to build a string phone.

"An illustrated biography of the inventor of the telephone"-- "Did you know that Bell's amazing invention--the telephone--stemmed from his work on teaching the deaf? Both his mother and wife were deaf. Or, did you know that in later years he refused to have a telephone in his study? Bell's story will fascinate young readers interested in the early history of modern technology!"--