"When you are a kid, our parents and elders ask a question - what are you going to be when you grow up. You never have an answer and today at 73, I have an answer - I want to be a kid again," he told reporters here.
He was speaking at the first look launch of Bengali film 'Open Tee Bioscope' which is produced by Shoojit Sircar.
Bachchan, who is shooting for Sircar's Hindi film 'Piku' in Kolkata, recalled that some of his early years during 1962-69 were spent in the city.
"It was a great joy and yes we were young, we were single and we were independent. We did many things which can't be narrated here," the actor said.
He wondered that after working for the entire day "we think are we working for a living or are we living to work".