Answer:
I am a bird but I cannot fly. I'm the fastest runner of all birds. What am I?
A pony trots his way through the world on these.
They're actually great swimmers now, but later they will become excellent hoppers.
A huge mythical animal said to resemble a whale.
I'm a bird that can repeat the words you say. What am I?
In your fire you hear me scream! Creaking and whining yet I am dead before you lay me in your hearth.