Why do we buy what we buy? Jacques Peretti investigates consumerism and the people who try and shape the public's appetites.

In the last of this three-part series, Jacques reveals how the lessons learned from selling to children were used to make childlike consumers of us all. From the rise of product-driven kids' TV in the 80s, to the man who designed cars that appealed to children, and the contemporary creators of games that hook adults, Jacques asks how spending turned into a game - one that we can't stop playing.

In the first of this three-part series investigating consumer spending, Jacques reveals how the concept of product lifespan holds the key to our ever-churning consumerism.