¿Por qué hibernan los animales? (Why Animals Hibernate)

Defines pulleys, explains their functions, and suggests simple experiments to demonstrate how they work.

Por años, La Biblia ilustrada ha deleitado tanto a jóvenes como a adultos. Ahora, ha sido actualizada con nuevas e interesantes características incluyendo: Páginas de datos "¿Sabías que?," itinerarios, lista de historias, mapas y mucho más. A los niños les encantarán las grandes historias y los dibujos de la recientemente actualizada Biblia ilustrada. La Palabra de Dios cobrará vida durante las horas de placer leyendo en familia. Un gran éxito de superventas. For years, The Picture Bible has delighted young and old. Now updated with interesting new features, including "Did you...

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...

This book makes learning about the concept of opposites fun, as readers discover recognizable examples of objects that are hot and cold! Using colorful photographs that connect to simple text, alongside exciting and recognizable sight words, young readers will enjoy learning about hot and cold things, while also building confidence in their reading skills. This book also includes a page for caregivers and teachers that suggests guiding questions to help aid in reading comprehension.