Answer:
Known to accessorize with feathers, trumpets, and harps.
Round as an apple, deep as a cup, and all the kings' horses can't fill it up. What is it?
What has three ways out and just one way in?
What runs around all day. Then lies under the bed. With its tongue hanging out?
My sides are firmly laced about, Yet nothing is withinΝΎ You'll think my head is strange indeed, Being nothing else but skin.
What never gets any wetter no matter how hard it rains?