Ronda que ronda la ronda

Examines the nature of inclined planes and wedges, how they can reduce the amount of force necessary to perform work, and ways in which they are used.

Readers won't have to disassemble their favorite toys to discover what makes them work. This book explores electric, magnetic, and motion-powered toys from design to function. It introduces readers to the six simple machines and explains how they use force and motion to do work. Not every toy is a technological marvel. Readers learn about time-honored favorites including the rocking horse, Slinky, and rattles.

In this enthralling, Spanish-translated nonfiction title that features informational text, vivid photos, stimulating facts, and colorful diagrams, readers will learn all about tornadoes and hurricanes--from how they are formed to where are they are most common. This 6-Pack includes six copies of this title and a lesson plan.

"Provides clues about an owl's physical characteristics, behaviors, and habitats in a guessing game format."--From source other than the Library of Congress