All. Day. Long.

..and sometimes at night.  Nora has found her voice and her thumb.  She is so interested in them both, that she now wakes up in the middle of the night to yodle and suck her thumb.  of course, she then realizes she's hungry, so instead of sleeping through the night, she yodles, plays with her thumb, then has to nurse to get back to sleep.  fun times.