Attack of the Cutes. Imagine, if you will, the song "Baby Did a Bad, Bad Thing," by Chris Isaak. Add to that one five-month-old bebe that's just learned to sway back and forth to the music. On top of that, add momma lying on the floor next to her, close enough for bebe to reack out and touch.
So. Ray starts rocking back and forth until she happens to bang into my arm. She laughs. She does it again. And again. Finally I pick up my arm and roll out of the way. Sure enough, she rolls completely over, and is completely pissed.
...And she now knows how to make rattles rattle.