私、ベビーフードは自分で作るの。いっぺんにたくさん作って、冷凍しちゃうのよ。
I make baby food myself.　I make a lot all at once and freeze it.

　あら、それいい考えじゃない！　何で思い付かなかったのかしら。
Hey, that's a good idea!　I can't believe I didn't think of that. / (Now) why didn't I think of that?