On his 74th birthday on Tuesday, Bollywood megastar Amitabh Bachchan unveiled a jukebox gifted to him by his fans. He said it is "precious and memorable" for him."A few years back, someone for Amsterdam had come and told me, 'We make such things and we would like to make something for you'. I don't know whether a jukebox will be there or not in the future but this gift is very memorable and precious to me. I will keep this in my office here," Amitabh told the media at his office here on Tuesday morning.With a career that has spanned over four decades, the actor has explored various characters and looks. He has also travelled widely and explored new things. His hunger to learn more hasn't gone.On his birthday, he said he hopes to learn to play new instruments and learn new languages."I can't play any instruments, but we do have different instruments at our place and I want to learn to play different instruments. I want to learn different languages. I will take out time for that," said the actor, whose energy and passion towards his craft leave many of his juniors in the industry in awe.As a Sunday routine, the gates of the actor's residence get thronged by fans who wait to catch a glimpse of him and wave at him. On his birthday too, fans came in to greet him.Asked about how he was planning to spend the day, he said: "I will be spending my day with my family."Big B, who married actress Jaya Bhaduri, has two children -- daughter Shweta and son Abhishek, and three grandchildren -- Navya Naveli, Agastya and Aaradhya.