A child is nothing like a racing car. . . . Souping up babies doesn't work that way. The child is what she is. There is a certain irreducible if elusive core. Pushing, pulling, stretching, and shrinking will not really change it. There may be spectacular interim results. The baby may say the alphabet before she walks, master two-times or even ten-times table at three. In the long run, however, this forced precocity tends to be irrelevant. . . . Whatever gains there are become unimportant. The losses can be irrevocable.