El cerebro (Brain)

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. This 6-Pack includes six...

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.

¿Necesitas una nueva funda para tu móvil? ¿O quizá te encantaría tener tu propio portalápices personalizado? En este libro descubrirás 27 divertidas manualidades inspiradas en los unicornios y explicadas paso a paso, que despertarán tu faceta más mágica y creativa. Y además te darán un montón de ideas para regalar, preparar una fiesta temática de unicornios, personalizar y organizar tus útiles escolares, decorar tu habitación y muchas cosas más. ¡Los límites los pone tu imaginación!

¡El regalo perfecto para verdaderos fanáticos de los dinosaurios! Diviértete y aprende con motivos únicos y asombrosos datos de los dinosaurios, estos animales prehistóricos que habitaron el planeta antes que los humanos. ¿Qué comían?, ¿Cuánto pesaban?, ¿Qué tan grandes fueron? Son algunos datos que encontrarás al interior. El contenido de este libro está diseñado para promover las habilidades artísticas y el desarrollo cognitivo de niños y niñas pequeños en edad preescolar y escolar. Las páginas están impresas por un solo lado para que puedas recortar y colgar o regalar...

This complete Spanish translation of the highly acclaimed Isaac Asimov's 21st Century Library of the Universe is ideal for students still developing their English-language skills.

Tommy Fuller and his family help a runaway slave family follow the stars in the Little Bear constellation to freedom.