Briggs, Korwin

"When the Invention Hunters, a group of globe-trotting invention collectors, visit a construction site in their flying museum, a boy helps them by explaining how simple machines like levers, pulleys, and cranks work"--Provided by publisher.

"When the Invention Hunters, a group of globe-trotting invention collectors, visit a school in their flying museum, a student helps them by explaining how common concepts related to light, like refraction, magnification, and reflection, and objects, like cameras and televisions, work"--Provided by publisher.

"Featuring more than 70 characters from 23 cultures around the world, this A-to-Z encyclopedia of mythology is a who's who of powerful gods and goddesses, warriors and kings, enchanted creatures and earthshaking giants whose stories have been passed down since the beginning of time--and are now given fresh life for a new generation of young readers"--Back cover.