Automaker Smart wanted to show that its Fortwo model might be small — measuring just 1.5 meters by 3 meters — but it's still fun. The solution was to create "big fun in a small space." With that in mind, Smart looked for small spaces in which to promote the world's smallest online game.

For a more in-depth look at this Idea of the Week and other case studies, visit Ad Age and CMDglobal's Inspiration site.