Mi mundo dia a dia / My world every day

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.

Introduces the former Duke University basketball star, Grant Hill, who now plays for the Detroit Pistons.

En este ensayo, Santiago Ocampos propone una mirada crítica, sin perder el estilo poético de su prosa, para un viaje literario que va desde Sófocles a García Márquez, entre otros, hacia la esencia del ser.

Describes sexually transmitted diseases, including AIDS, syphilis, gonorrhea, and genital herpes, and discusses their medical dangers and where to get help.