Cómo funcionan los parques de diversiones (How Amusement Parks Work) 6-Pack

Readers won't have to disassemble their favorite toys to discover what makes them work. This book explores electric, magnetic, and motion-powered toys from design to function. It introduces readers to the six simple machines and explains how they use force and motion to do work. Not every toy is a technological marvel. Readers learn about time-honored favorites including the rocking horse, Slinky, and rattles.

The need for speed is the motivating factor in this engaging, Spanish book. Readers learn the history of travel from the very slow to the supersonic and beyond, including everything in between. They learn and discover the factors that influence motion for all types of vehicles: land, air, and water alike. They also learn different ways to measure speed and read about energy uses for different vehicles. With greater speed comes greater risk. Readers learn how engineers are always seeking new and better ways to keep people safe as they travel faster and go farther.

Where is your brain exactly? What does it do? Use your brain to read this engaging, Spanish-translated title and learn all about it!

Everybody knows that America declared its independence in 1776, but the young republic did not immediately get into one indivisible nation of united states. Here is the unforgettable story of 55 men who created a Constitution in 1787 that gave the struggling new government a foundation that has held strong ever since. "Should be invaluable."--"Kirkus Reviews." Full-color illustrations.

En donde yo nací la cosa es muy curiosa: a nadie le importa mi apariencia. En cambio, en tu mundo algunos podrían confundirme con la toalla del perro (la verdad, me parezco más a la nada). Puedo atravesar paredes, conozco personalmente a las musas inspiradoras y soy capaz de hacer amistad con un bebé presumido.

Alucina con este libro donde gigantosaurus, velociraptores,braquiosaurus, diplodocus, triceratops y muchos dinosaurios más cobran vida bajo las mágicas lentes en tres dimensiones. Las detalladas ilustraciones, información objetiva y datos curiosos, unidos al novedoso visor 3D, te invitan a explorar, con todo lujo de detalle, un mundo natural lleno de criaturas fascinantes. Una colección entretenida y educativa para toda la familia.

¿Qué sucedería si se mezclaran los avances tecnológicos del siglo XXI con los poderes ocultos de la ouija? ¿Qué peligros esconden la nanotecnología y la ouija virtual realizado a través de internet? Una empresa dedicada a investigaciones con tecnología espacial, revoluciona el mundo con inventos para acabar con el cáncer mediante la nanotecnología, evitar accidentes de tráfico con su red de carreteras inteligentes, curar enfermedades psicológicas con realidad virtual o hacer viajar la electricidad por ondas, convirtiendo a los cables y enchufes en pequeñas piezas de museos. El...