This exhibit was very alluring and simple. Nightlights, with sensors that switch them on when the surroundings are dark, take on a whole new meaning when they are positioned in a grid such that each of them influences each other. Rotating one causes the other to light up, or off. Covering the sensor of one results in a chain reaction across bulbs that sense. Even more intriguing, the bulbs can be made to flicker by adjusting the relative positions of two or more just right - to induce a pulsating feedback loop. Most interestingly, I discovered when I set my camera's strobe to flash in a 10 Hz burst, the relative on-off's of the light bulbs changed! Like I had stored into them two memory states!