E.K.
I have not looked at any of the responses yet, but here's my 2 cents. If they can move their head left to right and back again, AND they can roll over, then they can have a blanket. That's what I used when trying to decide timing. SO I would have to say yes. In fact by my children's (now 13,11 & 6) 2nd birthday they all had pillows and blankets, and bears in bed with them.