Good product design—design that solves a real need; design that considers the strengths and weaknesses of the user; design that stands the test of time and cultural fads—always incorporates the the 3 F’s: Fun, Functionality, and Flow. It’s easy to talk about the 3 F’s in abstract, but I thought taking a concrete example of a bicycle would be more productive. A bicycle is a designed object that satisfies a real need, does so in way that brings joy to its users, and the act of riding results in flow experience for many. The old “Liberator” poster tries to communicate all 3 F’s to the potential buyers of its products: liberator means freedom to move, real functionality; the woman warrior communicates power and fun—you will feel the way she looks! It’s exhilarating! Notice the high heels and the beautiful vista (with a rough terrain) and a kid pointing at the riders with envy. These posters, old advertising ads for bicycles, try to communicate the same: it’s fun, functional, and exciting to ride a bike. Ride, and look good. Ride, and be the center of attention. Design for Fun So what makes a particular design fun? It seems that one of…