The document discusses how Amitabh Bachchan transformed into his role as a 13-year old boy with progeria for the film Paa. It took 4-5 hours of prosthetic makeup application daily done by Hollywood makeup artists. The makeup cost 10% of the total film budget and involved dentures to alter Bachchan's voice to sound like a child, which he wore throughout filming and during dubbing sessions. Despite the extensive makeup process, Bachchan remained patient, cooperative and enthusiastic for his role.