Megastar Amitabh Bachchan says it is the best time to be with his three-year-old granddaughter Aaradhya, who is a curious child and very mature for her age.Aaradhya is Abhishek and Aishwarya's daughter and the 72-year-old grandfather said that he loves spending time with her."The little one gets precocious by the hour.. and talks non stop… with as many questions as one could possibly imagine… it's the best time to be with her."Her homemade stories, her banter of what she feels about situations, her friends, her family, her toys and her home…!! These are indeed the happiest days of their lives… before they get exposed to this big bad world! (sic)," Big B wrote on his official blog.Abhishek and Aishwarya, who got married in 2007, welcomed Aaradhya in 2011.