Yo Manejo Un Quitanieves/I Drive a Snowplow

Presents a typical day of a bulldozer driver, with the safety equipment he puts on, the levers, beeper, and blades he uses in its operation, and what he does to get the bulldozer ready for the next day.

What is matter and where can it be found? Everything in the world is made of matter, whether it is a solid, a liquid, or a gas. Important ideas about matter such as volume, mass, and how matter changes state are conveyed through a series of easy-to-do experiments.

In this Spanish title, learn about what makes endangered jungle animals so unique and why they need to be protected.

When President Thomas Jefferson bought the Louisiana Territory from cash-strapped France in 1803, he doubled the size of the United States without really knowing what he was getting. He dispatched Meriwether Lewis and William Clark and their Corps of Discovery to explore a territory that would include part or all of fifteen future states and to seek a water route to the West Coast. Westward expansion began immediately, all for the bargain price of 15 million dollars. This book richly explores this fascinating part of history.

¿Por qué hay estaciones? ¿Por qué cambia el tiempo de una estación a la siguiente? Irene y su hermano Bruno tienen mucha curiosidad. Acompáñalos en esta aventura y descubre con ellos las respuestas a estas y a muchas otras preguntas que quizá también tú alguna vez hayas querido conocer. Conoce cómo cambia el tiempo según cada estación y cómo se adaptan las plantas, los animales y los seres humanos a esos cambios. Incluye una guía para los padres, con mucha información.