Sometimes I try to spend the day left handed. This is good for a right handed piano player. Holding a pen, using a fork, drinking from a coffee cup – all like a lefty. It effects the way I feel and create later at the piano. I’m so convinced that it’s useful to be a lefty in a right hand dominated society, especially for a pianist, that I try to encourage my 2 year old daughter to be a lefty assuming you can influence these things and assuming she has any interest in being a pianist.
But the odds are more likely one’s offspring would rather take a 180˚ turn from whatever their parents do. Good luck running for the Natural Law Party kid.