Just too smart...

As I was playing with my daughter and the twins were in their cribs for the evening, I heard one of the baby's crying. My daughter looked up at me and said "don't you know if you leave them alone, they'll cry for a minute and then they'll stop"! I stopped in my tracks and looked at her, when she continued and said "really mom, you just fed & changed them, they'll be fine". Now when did my 3 year old get so smart?