The Indian Institute of Technology Bombay's (IIT-B) Techfest started on Friday with a host on innovations on display, right from a self-testing device for rape survivors, robots that can dance and play football to pothole-mapping devices and a solar chai stall (see box).

In addition to these, the annual festival of the premier technology institute also has a major Artificial Intelligence (AI) display, with presentations from the Indian Army and DRDO. With a footfall of around 30,000 on the first day, Techfest is expecting more than a lakh visitors over the weekend.