To engineer an object means to make choices. Bill illustrates how the choice of having a single heating element made an engineer find a creative way to pump water with no moving parts.
Using slow motion video Bill Hammack shows how the mechanical digital-to-analogue converter of IBM's revolutionary 'golf ball' typewriter works.
Bill sings a song - with help from Doris Day - about the geiger counter. He shows that scientist Hans Geiger became an engineer when he designed the counter as a tool to make his life easier.
Bill reads from his book of fairy tales. He tells the story of the engineering of a light bulb, focusing on the materials breakthrough needed to make the filament.