The clay exercise conducted by Prof. A. G. Rao in 1991 at IDC IIT Bombay was a significant event. Prof. Rao was known for his innovative teaching methods and his emphasis on hands-on learning. The clay exercise was designed to help students explore their creativity and understand the basics of form and structure through tactile engagement with the material. It encouraged students to think beyond traditional design constraints and develop a deeper appreciation for materiality in design. The exercise likely included activities where students shaped clay into various forms, experimenting with different techniques and approaches to achieve their design goals.