When he was young, Shah Rukh Khan thought life gets over in the 40s. But now that he is there, he doesn't feel it's any big deal. "I feel more stronger and enthusiastic today. In fact, when I play with my kids' friends, I don't use age as a criteria to perform less. I still think I can beat kids half my age at half the things I do, physically I mean. Age has become a number for me now. It doesn't matter that a few more grey strands have come. I always had grey hair which I have been dyeing for the last five years. I feel I am the most looked after person in the world," said King Khan who turns 42 today.