chess and physics are quite different, it's much easier to teach chess because it's a game and children love playing and beating their opponent.
also, you need to learn much more for physics and i don't think many children will gain access to a particle accelerator

about the polgar household
http://www.telegraph.co.uk/health/3294892/Queen-take...
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however there is a distinct possibility that you can make a child a genius in advanced sciences , someone already mentioned sidis and he is an example of what can be achieved and of the costs...

if Mr williams had "taught" his daughters golf there is a good chance that they would have become very successful golf players, tiger woods was engineered too as you can see.
http://www.youtube.com/watch?v=_wHkA_983_s

however, since golf does not involve much running and jumping it would have been a wrong move on his part as he would be giving up the racial advantages.

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