Japanese artist Jarashi Suki developed dominoes that trip each other even without physical contact. Each one has a number, 1-5, displayed with dots. You can change the number of a domino by shaking it. When domino 1 falls, it will then trip 2, which will then trip 3, and so on. The video shows creative ways that this system can be used to make domino chains that would be impossible with conventional dominoes.
Link and Video via OhGizmo!