Real Madrid have just paid £38.7m for a 16-year-old Brazilian player called Vinicius Junior.
Here's an interesting article about other young players who were tipped to be great at some point.
Martin Odegaard, Bojan Krkic, Freddy Adu obviously, Federico Macheda, Nicklas Bendtner and Sonny Pike are the examples.
http://www.bbc.co.uk/bbcthree/item/a...1-a63129293824