Explore the science behind simple machines and mechanisms - from levers, gears, and pulleys to ratchets, cams, and cranks. Then build your very own machines and discover for yourself how they work.

A must for budding engineers, this unique interactive book contains all you need to build 12 working models. Just bolt the colour-coded cogs, rods, and wheels onto the perforated workshop following the simple instructions. Then start operating your machines to see how they work!