El queso y los gusanos

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 1876, France decided to give the United States a very big and very special present--the Statue of Liberty. The gift was to commemorate the 100th birthday of the United States, and just packing it was no small feat--350 pieces in 214 crates shipped across the ocean. The story of how the 111-foot-tall lady took her place in the New York Harbor will fascinate young readers.

Two adorable sisters have something very important to do. They must plan, arrange, and decorate for a great surprise, because it's Dad's birthday. Books of the Neighborhood Readers Program build early literacy skills, introduce important content-area language, and help develop speaking and writing skills. They can be integrated into any existing language arts or core reading programs.

El presente volumen incluye dos obras de juventud de una de las personalidades más relevantes del siglo XVI italiano: Eneas Silvio Picolomini (1405-1464), conocido como Pio II tras ser elegido papa en 1458. La colección de poemas Cintia está formada por veintitrés composiciones de tono erótico destinadas a Angela Acherisi. Por su parte, la Historia de dos amantes narra el amor de Lucrecia, noble matrona de la ciudad de Siena, por Euríalo, caballero de la corte del emperador Segismundo, y en ella adquiere mucha importancia la comunicación epistolar.