La historia del fuego

"Some things are so huge or so old that it's hard to wrap your mind around them. But what if we took these big, hard-to-imagine objects and events and compared them to things we can see, feel and touch? Instantly, we'd see our world in a whole new way." So begins this endlessly intriguing guide to better understanding all those really big ideas and numbers children come across on a regular basis. Author David J. Smith has found clever devices to scale down everything from time lines (the history of Earth compressed into one year), to quantities (all the wealth in the world divided into one...

What do a shark, a seahorse, and a ray have in common? They're all fish! Learn about the characteristics that all fish share.

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.

LOS RELATOS DEL ABUELO "LAS RAZAS" Durante las vacaciones de verano, mientras disfrutan de sus paseos por el campo, un día un Pedrito al contemplar las lejanas montañas exclama ¡Abuelo, qué grande es el mundo! El abuelo, a través de una serie de relatos hace que Pedrito y a sus amigos conozcan, amen y respeten a las diferencias que en RAZAS, CULTURAS y RELIGIONES, el mundo les ofrece. Para ello les hace viajar virtualmente por LOS CINCO CONTINENTES.