It isn't just stocks that are splitting. So is Parenting. This month, the magazine transforms itself into two targeted editions: Parenting School Years and Parenting Early Years. Both are getting a design makeover. I have to limit myself to the former. Yes, kids are cute, but much better company once toilet-trained. Then you can take them to the theater, even if it's "Curious George Goes to the Moon." At least, it's a live performance. Later, they can toe-tap to "Guys and Dolls" and wonder at "Wicked."