"people zoos"

Nathan: Mom. We need to buy a girl.
Me: Just how much does a girl cost these days?
Nathan: 5cents. no, maybe a quarter.
Dennis: You can't buy a girl. They don't sell them in stores.
Me: Sometimes in a place called an orphanage, you can bring home a girl that doesn't have a home.
Noah: Like a people zoo. That's where you can just buy kids. Right mom? =)