Nap time humming

Pria has 3 naps a day right now. The first one she is usually so tired she just falls asleep nursing. The 2nd and 3rd I put her to sleep with our oven fan on, sing or hum songs and bounce her slowly (unless we are out shopping or something). I think she has caught on to this routine because when I turn on the oven fan and start swaying with her, she starts to hum before I even start. It is kind of cute haha. Of course she can't carry a tune yet but it is close enough.