Hang a curtain rod draped with sheer curtains (or fabric) at headboard height, behind the bed, then add some white holiday lights behind the fabric and across the rod.--- maybe just a string of lights over the headboard :)
Yarn Ball Mobile-dilute glue, dip long pieces of yarn in glue, wipe off excess. bloow up a balloon part way, wrap yarn around to form a ball. When dry pop balloon, use them on your yarn mobile. If I ever have a craft room.