It is said that necessity is the mother of invention. But time is the driver of technological development. See how the inventions we use every day, from cars to cell phones, have evolved from their birth to today''s technological advancements. A running timeline on each page makes this series perfect for supporting STEM topics in the elementary grades. This book for elementary readers highlights the changes in automobiles from the first steam-powered cart to today''s driverless cars. Engaging photographs and a running timeline illustrate important developments in technology that brought ideas to real-life. A table of contents, glossary, further resources, and an index are included.