Chatterbox: Blab About Books

You know when you come across something and you just REALLY want to put it in a book you write? But you don't know how? Well, I was looking around and found a book of nursery rhymes from the library, and some of them I never even knew! And I started to get a realistic fiction book idea about a girl who loved nursery rhymes, went into middle school, and kind of fell in love with someone? Or maybe just friends, since it's middle school, but with a boy. And nursery rhymes could be a big part of it? There are really cool things in this book. Does anyone have any ideas?