Answer:
They're up near the sky, on something very tall. Sometimes they die, only then do they fall.
You can only have it once you have given it.
What has a mouth but can't chew?
When the horse strokes the cat, the wood begins to sing.
What 8 letter word can have a letter taken away and it still makes a word. Take another letter away and it still makes a word. Keep on doing that until you have one letter left. What is the word?
What did the piece of wood say when he saw the screwdriver and screws approaching?