Answer:
What has a bell but isn't a church. Is full of air but is not a balloon?
I am the yellow hem of the sea's blue skirt.
What is long and slim, works in light. Has but one eye, and an awful bite?
What is red and nailed to a wall?
Who spends the day at the window, goes to the table for meals. And hides at night?
How can you tell when a mummy has a cold?