Las siete cajas

¿Sabías que James Madison ayudó a escribir la Constitución de Estados Unidos de América? Fue también el cuarto presidente de los Estados Unidos. Podrás encontrar estos y muchos otros datos interesantes en James Madison, uno de los libros de Padres Fundadores. Did you know that James Madison helped write the U.S. Constitution? He was also the fourth president of the United States. These interesting facts and more can be found in James Madison, a Founding Fathers book.

Wind Power: A waving flag, blowing leaves, a kite soaring through the skyall are moved by wind power. Wind is also our fast-growing source of energy. Find out how wind forms and the different ways we may use it in the future.

For many years, people believed there were nine planets that orbited the sun. Now we say there are eight. What happened to the ninth planet, Pluto? What are the different planets like? What exactly makes a planet a planet? These are the many intriguing questions answered with this high-interest book, crafted to be accessible for readers of all levels. Young astronomers will be especially fascinated by the stunning photographs and the "Make the Grade" fact boxes.

Simple text and pictures introduce facts about snowplows and tells what they are used for and why they are important.