SkyCall project aims to prove the suitability of flying drones not only for war and espionage, but also for the positive applications, for example as a guide. Each device uses a Wi-Fi network, the data GPS, and a camera for orientation in space, and supports voice interface that can tell about the play. Currently, the prototype is being tested in a maze of the Massachusetts Institute of Technology.
Read another very interesting article about alternative energy of the Sun, water and air.