Through a fun question and answer format combined with clever illustrations, this informative book relates important details about simple machines. Young readers will enjoy the humor and appreciate the clear answers the book provides.

From the creator of the "stunning" ("Booklist") "Moonshot" comes a rich and detailed sensory exploration of America's early railroads. These pages come alive with the details of the trip and the sounds, speed, and strength of the mighty locomotives of the 19th century. Full color.

Fascinating exploration of the progress, potential, and challenges of developing beneficial robots. Loaded with information and photographs, young fans of science and science fiction will enjoy this detailed overview.

Great photographs and informative text provide interesting facts about trains and their history.