NEC's Kotohana, the LED flower

This is one flower that reads your emotions. Equipped with a microphone, the NEC Kotohana, listens for changes in your vocal tone or inflection and alters to change its colors from joyness to sadness. Joy, for instance, would be represented by yellow, while sadness would come across as blue. And when you're excited, you'll see red. Otherwise, the flower will reflect a state of normalcy with the color green.