Betsy Ross

A simple biography of the man who worked to win fairer treatment of the migrant farm workers in California in the 1960s and to establish the United Farm Workers union.

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.

Expressive language by the Mexican ballerina, choreographer, and teacher explores what she calls the "poetry of images" in Puebla--a classical ballet and an interpretative modern dance with multiple people forming a slithering snake across the stage--accompanied by a series of stunning black and white photographs that capture the variety of expression and the fluid grace of the dancers.

What is work? You may think work is doing chores or going to a job, but you do work every time you move something from one place to another. With experiments that demonstrate these fundamental concepts, discover how you work, and how simple machines make doing work easier.