How It's Made - Season 4 (2004)

Learn about the beat behind conga drums, get the hard facts about metal plating, and find out what's cute about creating buttons.

Discover how grinding wheels are made, compost is prepared, window blinds are constructed, and milk is processed.

Find out how brushes and push brooms are manufactured, how blackboards are formed, how salmon is smoked and how zippers work.

Discover the manufacturing secrets of 3D commercial signs, hardwood floors, corrugated polyethylene pipe, and mattresses.

Find out how ceramic tiles are made, nuts are cultivated, steel forgings are manufactured, and skateboards are crafted.

Find out how everyday items are manufactured, including car engines, flour, recliners and envelopes.

Follow the diverse manufacturing processes that yield plastic cups and cutlery, special effects makeup, gold, and harps.

Find out how countertop laminate is produced, how frozen treats are concocted, how building blocks are constructed and how detergents are made.

Find out the details in the construction of architectural moldings, pulleys, industrial rubber hoses, and sheet vinyl.

Discover what it takes to make putty knives, garage doors, electric motors, and wool.