Sibling playing already begun! My four year old has yet to let her sleep.... And she's still in there baking!! Hahaha. Every time he will ask me "is she kicking momma?" "Not right now, she's sleeping" then proceeds to shake my belly and yell wake up in it! Hahaha! She responds every time to his voice. Hopefully an entire day of this means she'll let me sleep through the night and not kick my bladder!