Answer:
I have a tongue, but do not talk. I follow close, but neither run nor walk. Coupled and hitched, but never married. You couldn't bear the load I've carried.
What breaks on the water but never on the land?
What word has kst in the middle, in the beginning, and at the end?
Has feathers but can't fly. Rests on legs but can't walk.
I can be moved. I can be rolled. But nothing will I hold. I'm red and I'm blue, and I can be other colors too. Having no head, though similar in shape. I have no eyes - yet move all over the place.
I repeat only the last word you say. The more I repeat, the softer I got. I cannot be seen but can be heard. What am I?