Obedecer las reglas

How are crayons made? Clear wax is melted in a factory. Once it's melted, color is added to it, it is poured into crayon-shaped molds, cooled, and wrapped in a paper label. Sorted into sets, the brightly colored crayons are boxed and sent in trucks to stores to be sold to you.

El chocolate es una golosina sabrosa. ¿Pero sabías que el chocolate viene de una vaina de cacao que crece en un árbol? Sigue cada paso del proceso para descubrir cómo una vaina de cacao se transforma en chocolate. Chocolate is a tasty treat. But did you know that chocolate starts as a bean growing on a tree? Follow each step in the process to discover how a bean becomes chocolate. Now in Spanish!

La hibernación es un ciclo que algunos animales hacen cada año. La mayoría de la gente sabe que los osos hibernan. ¿Pero por qué hibernan? ¿Y qué otros animales hibernan? Hibernation is a cycle that some animals go through every year. Most people know that bears hibernate. But why do they hibernate? And what other animals hibernate?

For ages, the idea of machines that think and act on their own has gripped scientists, thinkers, and the general public. This book explores the history of artificial intelligence (A.I.), and how science fiction is quickly becoming science fact. It examines the technologies involved in A.I. and its inevitable effects on work, life, health, and many other aspects of human society. Rooted in history and science, this book provides an inside look at a topic that captivates engineers, scientists, and dreamers, but also raises important ethical issues and challenges how we see ourselves and our...

Una colección de libros que invita a viajar al pasado remoto. Las aventuras de un enorme herbívoro prehistórico. La colección Dino-historias conjunta la divulgación con la narrativa de aventuras. Mediante los recursos propios del cómic, también llamado novela gráfica, estos libros recrean la vida en la prehistoria y muestran las características, hábitos, alimentación y otros datos relevantes en torno a los grandes dinosaurios. Todo ello mediante emocionantes relatos de lucha y supervivencia. Este volumen en particular trae hasta nosotros al iguanodonte, cuyo nombre quiere decir...

Discover the world of mammals in this delightful nonfiction title! Readers will learn all about different mammals--from primates to marsupials, and rabbits to whales, even omnivores and herbivores. Featuring vivid photos and charts, clear text, and stimulating facts, this Spanish-translated book will have children eager to learn all they can about mammals! This 6-Pack includes six copies of this title and a lesson plan.

Despite unprecedented economic growth, the injustices and turmoil endured by Mexico over the course of Porfirio Diaz's three-decade presidency would lead to the outbreak of that country's biggest social revolution. In this profusely-illustrated history book for children, the events surrounded Porfirio Diaz's mandate are narrated in a simple, clear style. The book's profuse illustrations contribute to a didactic and comprehensive understanding of the Porfiriato. The supplementary charts and the timeline spanning the 1876-1911 period help organize and narrow down the most relevant facts in this ...