El Pacto Del Mayflower /

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

These titles look at many of the animals typically found in zoos, covering such topics as appearance, behavior, and babies. Vivid photographs compare the habitat and diet of each animal, both in the wild and the zoo.

When people go to sleep, bats are just waking up. While young readers may recognize the image of bats in the night skies, where they live may be less familiar. This title takes readers inside bat roosts to uncover the fascinating facts about this creature. Readers will learn the basics of bat roosts—in caves and beyond—and how they help bats survive in the wild. The text also looks at bat’s appearance, behavior, and the crucial role they play in nature’s ecosystems—topics covered in most elementary science curricula. Diagrams, fact boxes, colorful images encourage learning.

Describes the U.S. Army Rangers, including their missions, vehicles, weapons, equipment, and duties. Written in English and Spanish.

Today is Mauro's Birthday. Everything is ready for the celebration; his friends have a lot of presents for him.