Discover how to make a motor generator using a key in this step-by-step tutorial. Learn the principles of transforming ...

In this step-by-step tutorial, learn how to make an electric air pump at home using readily available materials. This DIY ...

Grandin, an animal scientist and spokeswoman for the autism community, offers a guide to two dozen projects grouped into five sections—paper, wood, levers and pulleys, objects that fly, and optical ...