FAD conditions
Famous examples
100

What "F" menas in the FAD conditions?

Fairness

100

What is the Piano Staircase?

This Hollywood staircase uses sensors and speakers to play musical notes as people walk.

200

What is Attractiveness?

A Shikake must satisfy this condition by "inviting" action rather than forcing it.

200

What is the World's Deepest Bin?

This Volkswagen "Fun Theory" invention collected 90 pounds more trash than a normal bin.

300

What is duality of Purpose?

This condition is met when the maker’s goal (solving a problem) is different from the user’s goal (having fun).

300

Why are the piano steps painted on only one side of the Hollywood staircase?

So they do not impede people who just want to use the stairs normally