La Pelota Perdida

Why do some things heat up quickly while others don't? How can heat cause matter to change form from solid to liquid to gas and back again? Heat cannot be seen, but it can easily be felt. Looking at different objects' molecular makeup, this book describes the fundamentals of heat and furthers understanding through a series of easy experiments.

Este libro nos habla del humor con conciencia y sensibilidad. Aborda con franqueza y perspicacia las sutilezas de reírnos de otros, de nosotros mismos, o de reír por reír sin ningún motivo en particular. Este libro habla tanto cuestionando lo que es apropiado o dañino, como afrontando inquietudes relacionadas a las burlas y bromas, la intimidación y agresión, ¿Qué es divertido? se centra en el desarrollo del carácter y en importantes conflictos de valores que los padres, profesores y profesionales que trabajan con niños, enfrentan hoy en día. Este título hace parte de la...

José Martí was barely 16 years old when he began to fight for the independence of his homeland through his writing. At 17 he was declared an enemy of Spain and sentenced to six years of prison and hard labor. But that did not stop him. Martí dedicated his life to defending Cuba's right to independence. Today he is remembered and honored as a man of integrity--brilliant and courageous--and as a lover of freedom and peace.

It s fiesta time! Cinco de Mayo is a fiesta day in Mexico and the United States. It s celebrated on the fifth of May. This colorful holiday honors Mexico s victory over the French army at the Battle of Pueblo in 1862. People march in parades, dance, and set off fireworks. Families enjoy traditional Mexican food and drink. Then they watch people act out the famous battle. Find out more about this joyful celebration of Mexican culture.