The new Kid Engineer series offers a closer look at the different engineering fields and skills needed for our world to function. Simple step-by-step hands-on activities bring the learning to life and encourage readers to develop their own engineering and design skills. Find out how the six simple machines — levers, pulleys, wheels, planes, wedges, and screws — work, and how engineers put them to use. Build your own pulley system, experiment with levers, and more! Paperback book. 32 Pages. Ages 9 and up.