Desde que somos tijera y papel

En las palabras quirúrgicas que Cristóbal Pera tan magistralmente define, describe, analiza y valora, nos adentramos por un territorio nuevo, por una cálida geografía donde se enraíza todo conocimiento y todo saber. Por eso, la lectura de tan luminoso libro es una continua incitación al pensamiento-por algo brota del originario saber de las manos-, a la reflexión sobre la vida y la muerte, sobre el dolor y la felicidad, sobre la angustia y la esperanza. Emilio Lledó

This book is a comprehensive, practical presentation of the principles of behavior modification and guidelines for their application. It teaches forms of behavior modification ranging from helping children learn necessary life skills to training pets, to solving personal behavior problems.

Explore outer space and learn about stars, galaxies, planets, asteroids and how these bodies are all related to one another. Featured in this book are photographs from outer space and related vocabulary.

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.