inky:

Tweenbots, an adorable robot/social experiment.

In New York City, we are very occupied with getting from one place to another. […] Tweenbots are human-dependent robots that navigate the city with the help of pedestrians they encounter. Rolling at a constant speed, in a straight line, Tweenbots have a destination displayed on a flag, and rely on people they meet to read this flag and to aim them in the right direction to reach their goal.