En los juegos del parque (At the Playground)

Read Along or Enhanced eBook: Invite readers to see what goes on behind the scenes at a school carnival! With informational, Spanish-translated text, vibrant photos and helpful charts, children are engaged from cover to cover while utilizing mathematic skills to learn the basics of planning, income, estimates, and budgeting.

Readers may never expect that they might free fall to Earth, but if they have ever dived into a pool, that's exactly what they've done. This book shows readers how Newton's three laws of motion affect divers, skydivers, and mountain climbers' movements. Readers discover who uses gravity, and who works against it, and all other forces that contribute to a successful dive or climb. After reading this book, readers can decide if they will ever be interested in engaging in one of these extreme sports.

Readers will be amazed to discover that every time they climb onto bicycles and ride like the wind, they are defying gravity! This book explains the physics and history behind bicycles, skateboards, and surfboards. Readers learn what happens from the simplest movement of rolling forward to more complex tricks and stunts of jumping and spinning. Readers will never look at bikes, skateboards or surfboards the same way again.

A humorous handbook for witches, providing instruction in areas such as spells, superstitions, recipes, gardening, and glamour.

Describes the physical characteristics, habitats, life cycle, and behavior of different kinds of reptiles, including alligators, turtles, snakes, and lizards.

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.

La Ciencia nueva es una obra clave de la tradición cultural de Occidente. Su concepción es de tal riqueza que se ha considerado a su autor, Giambattista Vico (1688-1744), precursor de los románticos, de Hegel y de Marx; da origen a la Estética moderna, y crea el ámbito necesario para el surgimiento de las ciencias humanas, cimentando los fundamentos de la lingüística y de la antropología actuales. A través del novedoso empeño de una filosofía de la historia, su amplia y compleja visión del mundo ha seguido fascinando a pensadores y creadores contemporáneos tan dispersos como...