Blanket? (No, not MJ's kid!)

Ok, here's a question, did anyone else's little one put blankets on their head?
Miss C has taken to pulling her blanket up over her head when she sleeps. Well, not just that, she is mobile in her crib. I swear she does laps at night to see if we will come see her. She also pulls her legs straight up and thumps her mattress. It sounds like she is wresting in there!
Back to the blanket. It's not just here either, when she is at Mrs J's house, she does it too. I've been freaking out because I go check on Miss C before I got to bed and there lies Miss C with her entire blanket on her head. DH swears she kicks it up there throughout the night. She has woken up a couple of nights recently because she is stuck in a corner with a darn blanket on her head.
Now, let me lay your concerns to rest by letting you know that she can breathe through her blankets. I have personally tested each of them, as has Miss C by now, and there is no issue there. I think its just a habit issue.
Per Mrs. J's suggestion, we've given her a "blankie" (I wrote it like that because it is actually a flour sack cloth we used to wrap her in when we lived down south with the center bunched and tied (multiple knots) with a cloth ribbon) and she cuddles with it and puts it over her head instead of her blanket. Not sure if it will keep her from pulling that darn blanket over her head throughout the night though!
Anyone have any recommendations?