The Elenco Engino Simple Machines pack combines the eight basic sets from Elenco"s mechanical science series. You"ll get to build all types of simple machines, including lever, wedge, wheel-and-axle, screw, inclined plane, and pulley, as well as gear and linkage - 60 working models total, complete with instruction booklets. Models include cars, cranes, and much, much more. Recommended for budding scientists and engineers six years and older. About Elenco Electronics, Inc. Elenco Electronics, Inc., was founded in 1972 by two electronic engineers. (The company"s name is the first two letters of the words "Electronic Engineering Corporation.") Located in Wheeling, Ill., the company has grown from that two-man operation in a garage to a workforce numbering more than 50. And the company"s products have broadened to meet customers" needs, now reaching telecommunication, education, toy, electric, and engineering fields. Through it all, Elenco"s founding principle has remained the same: efficiently design long-lasting, high-quality products. 318 parts to build 60 working levers, cranes, and more. 8-in-1 set with detailed instructions. Includes levers, linkages, wheels, axles, and pulleys. Includes inclined planes, wedges, gears, cams, cranks, and more. Recommended for ages 6 and up.