Inventions that changed the way we live! What did Johann Gutenberg do
that made printing books in quantity possible? What led to the
development of computers? How did Thomas Edison make the lightbulb
practical? How were the first engines created and their design
refined? Discover the innovations and inventors that laid the
foundations of modern technology through lessons with three levels of
difficulty, then test your knowledge with interactive quizzes and
challenging games. (Product Description)
