noticed the doll

This morning E was walking down the hall where a doll she's never played with was deposited after having the cat vomit washed off its butt. She was on her way to her room to do something, but she turned her head and noticed, for the first time since Christmas, this doll. She stopped, looked at it, picked it up and hugged it to her neck, and then carried it against her chest like a baby into her room.

I don't even know where she learned to do that. Either someone else has shown her what to do with a doll, or she's suddenly clicked that it represents a baby and she's treating it that way. It reminds me of the day the puppy I had suddenly had a need to bury his toy -- some kind of instinct kicking in. But of course maybe David and Erma play dolls with Emma all the time and I just don't know about it.