Answer:
What has a spine, tail, and leash but isn't a dog?
What has a foot but no legs?
It moves around in circles. We see it as we turn. It keeps us always warm. Always alive and always dying, Across the sky we see it flying, But touch it and we burn.
They live only in stories, taller than three storeys.
A locked sphere without hinges or key. Break me open and golden treasures you'll see
Written on with words of white, Has the color of the night, Is the teacher's best delight, And a student's daily fright