Answer:
I have feet on my head
I like to twirl my body but keep my head up high. After I go in, everything becomes tight. What am I?
Never ahead, ever behind, yet flying swiftly past, for a child, I last forever, for adults, I'm gone too fast.
When set loose I fly away. Never so cursed as when I go astray.
What is made of wood, but can't be sawed?
What language does a billboard speak?