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Provides The History Of Biofuels, Different Uses, Positive And Negative Characteristics, And How They Will Impact The Future.

Eco-Friendly Energy Is Explained. The Most Current Information Is Provided While Establishing The Understanding That It Does Not Take Much To Make The World A Better Place.

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

A young boy tries to help his younger brother, whose mind and body has become occupied by another boy, a young soldier in Saddam Hussein's army during the Persian Gulf War.

Whether you call your January 6th celebration El Dia de los Reyes or the Feast of the Epiphany, you're celebrating a day dedicated to the three kings. Sometimes called the three wise men or the magi, these figures are part of the Christmas story and often appear in nativity scenes during this time of year. In some places, they're more important than Santa Claus. In this volume, readers discover the history of the three kings' story as well as how they are celebrated in cultures around the world today.

¿Dónde puedes encontrar el color azul? ¿Tiene algún significado especial este color? Los jóvenes lectores aprenderán a identificar objetos azules y los lugares donde aparecen en Azul, uno de los libros de Los niños y la ciencia: Colores. Where can you find the color blue? Does this color have any special meanings? Young readers will learn to identify blue objects and the places they appear in Blue, a Science Kids: Colors book.

Para leer esta historia, te aconsejo que te pongas una nariz de payaso. Si no tienes una a mano, cierra los ojos e imagínatela. O piensa en aquel día en que te pusiste una y se te escapó una sonrisa, o en aquel otro en que hiciste payasadas y a tus amigos les acabó doliendo la barriga de tanta risa. Sin embargo, mira tú que este cuento no es de risa. Al menos, al principio...