Un contrato y sus consecuencias

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.

El regalo de un hechicero hace que la fortuna de Juan crezca de uno en uno, de dos en dos, luego de tres en tres y de cuatro en cuatro, despu s cada v z m s y m s, desafi ndote a llevar un registro de su riqueza.

An introduction to the educational background, equipment, clothing, and various duties of a construction worker.

When stunt performers go to work, they make dangerous feats look fun and easy, but there is a lot of risk behind this profession. Explore what stunt people do to prepare and keep themselves safe for a truly unique profession. In this Spanish-translated nonfiction title, readers will be introduced to a brief history of stunt performance as well as the latest tips and tricks, including stunt driving, professional fighting, and even digital effects such as computer-generated imagery and are encouraged to explore college majors and areas of study are recommended to become a stunt person. With...