Marc Yu, a seven-year-old concert pianist. At two he heard "Mary Had A Little Lamb", and immediately played it back, flawlessly. A year later he was playing Beethoven from memory. Now with a repertoire of more than 40 classical pieces, the young maestro's astounding brain has intrigued experts, such as development psychologist Professor Ellen Winner and neuroscientist Gottfired Schlaug. Winner and Schlaug focus on Marc Yu's achievements, and ask whether hard work is behind his success, or was he simply born with a brilliant brain? They also look at a class of 50 children learning music, and discover a number of changes are taking place in their brains. The experts believe that, given the right nuturing, any one of the youngsters could grow up to become a musical genius.