Answer:
I bind it and it walks. I loose it and it stops.
What breaks on the water but never on the land?
Thirty white horses on a red hill, First they champ, Then they stamp, Then they stand still.
They're up near the sky, on something very tall. Sometimes they die, only then do they fall.
Of no use to one, Bliss to two. Men lie for it. The baby’s right,
Break me and I am better immediately set and harder to be broken again.