DD is 7 months old now, and she usually sleeps fairly well now, except for when she's sick. I have been noticing lately though that she is waking up in the night sometimes, and I worry that it's because it's really cold in her room. She's already sleeping in a long-sleeved onesie, footed PJs, and a sleepsack, but she always sleeps much better in our room when she's snuggled in under some blankets. I know we're past the worst of the SIDS risk now, so I was wondering when others have decided to introduce blankets into their babies' cribs. Is it safe enough to do now, or should I keep on waiting?