There could nothing be more pleasure for Senior Citizens than spending quality time with their Grand Children. That's exactly what Amitabh Bachchan has been trying to do these days after reducing the work load by 75%. Here is a rare picture of Megastar with his grand children Navya Naveli and Agastya Nanda (Children of Amitach's Daughter Shweta).Big B used to the one of busiest actors in Bollywood until few years ago and every year there will be a minimum of 4-5 films. He did slow down a bit in the past 2 years and signing films of only few directors such as Balki. That really a smart movie considering the age factor!