It's never too early to plan on being a good parent. It's the stuff of many little girls' games, dreams and lifetime goals. Many little boys too, I imagine, but in my house, it's always the girls who play the mommy/baby game. Here's how it goes:
Girl 1: "I'll be the mommy and you be the baby."
Girl 2: "No, I want to be the mommy, this time. You always get to be the mommy."
Girl 1: "Well, you can't be the mommy because, I am. You can be the daddy if you want to. That's pretty good."