Get a tube sock and cut the foot off and put it on her like a snood. If she needs her ears out, cut slits for them. If you need to keep it from sliding, then just a smidge of paper tape (you'll find it in the drug store), it's adhesive is very weak. Or get rubber cement, put strips on a piece of hard plastic to dry. When it dries, it's soft and rubbery. Put that between the sock and head. It'll be less likely to slide anywhere.