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The Concept Of The Cube Is Defined Through Interesting Text And Photos Displaying How Cubes Can Be Found Throughout Our World.

As they say, necessity is the mother of invention, and this book introduces readers to 14 women who invented very useful, helpful items. They include Chicago native Margaret Wilcox who invented the car heater, Indiana native Marion O'Brien Donovan who invented disposable diapers, Pennsylvania native Stephanie Kwolek who invented Kevlar, and Austria-born actress Hedy Lamar whose secret communications systems led to the creation of WiFi, Bluetooth, and GPS.

Isa and Fer find out there's going to be a new baby in the family. Isa is delighted but Fer has mixed feelings.

Interesting facts and experiments explore the dynamics of a race car engine to teach about air flow and drag, safety equipment and roll cages, the fuel system and horsepower, suspension and track bars, internal combustion, why race cars don't have speedometers, how roof flaps are designed like airplane wings, and more.

BILINGÜE. Todo niño aprende a leer de diferentes maneras y a su propio paso. Los libros de la serie, ¡Yo sé leer!, ayudan a desarrollar su habilidad para leer y su crecimiento spiritual a través de libros basados en historias y valores bíblicos y diferentes niveles de aprendizaje. En, David, la victoria gigante de dios, David no se ve muy fuerte al frente del gigante Goliat. ¿Podrá el ganarle la batalla con cinco piedras lisas y la fortaleza de dios?