If you want a long boring explanation of Nero's musical talents, you could always take a look at this. http://penelope.uchicago.edu/Thayer/E/Journals/CJ/42/4/Nero_Fiddled*.html
I believe it was Nutmeg. Remember my Mother use to grate a nutmeg on the top of hot milk, use to really help in getting a great sleep, must have been the nutmeg, not the warm milk that did that.
Dominic Sibley of Surrey became the youngest ever player in modern cricket to score a double century. Who was the youngest ever double centurian?
W.G. Grace is certainly the youngest in English cricket, but I'm not sure if that's the right answer.