Harriet Tubman

What is work? You may think work is doing chores or going to a job, but you do work every time you move something from one place to another. With experiments that demonstrate these fundamental concepts, discover how you work, and how simple machines make doing work easier.

This New York Times bestseller, now available in Spanish, recounts the true story from Wilson Kimeli Naiyomah of the touching gift bestowed on the United States by a tribe of Maasai Warriors in the wake of the September 11 attacks. In June of 2002, a mere nine months since the September 11 attacks, a very unusual ceremony begins in a far-flung village in western Kenya. An American diplomat is surrounded by hundreds of Maasai people. A gift is about to be bestowed upon the American men, women, and children, and he is there to accept it. The gift is as unexpected as it is extraordinary. Hearts...

Grandes ideas para pequeños filósofos. ¡Tu primer libro pensar en grande! Es importante saber qué te hace feliz y cómo hacer felices a quienes quieres. ¿Sabes qué decía Aristóteles sobre la felicidad? Aristóteles creía que la mejor manera de vivir una vida feliz era llenarla de verdaderos amigos. Este libro inspirará a los más pequeños a tener pensamientos y conversaciones apasionantes sobre estas grandes ideas.

What did people use to buy things before money was invented? Where is money made? Find out in this inviting book that informs readers about coins, paper money, the Federal Reserve, exchange rates, and checking accounts. Featuring a timeline of money's history, detailed photos, stimulating facts, clear, informational text, and a glossary that will assist in improving vocabulary, this Spanish-translated nonfiction title will keep readers engaged from cover to cover.