Let me start by saying I've never experienced anything out of the ordinary or supernatural (although I've wanted to) so this was very surprising to me.
This happened just a few nights ago when my husband was out of town on a business trip. I had put my children to bed about two hours before and had gone to bed myself. A few hours after I had gone to bed I woke up out of a deep sleep and immediately looked over at my dresser. Above it was floating a dark colored object that was the shape of a ball and looked like lace. The ball started floating upward as I watched it. I wasn't afraid, I just couldn't tell what it was, so I got out of bed and tried to reach up and touch it. I couldn't feel anything and it disappeared. I felt like I should go check on my children and when I went and looked in the baby's crib to check on her, her blanket was totally covering her head and was even wrapped around the back of her head! I feel like what I saw was my baby's guardian angel warning me to go check on her.