Answer:
I can be entertaining until you realize some pieces have been lost.
I tremble at each breath of air and yet can heaviest burdens bear.
Weight in my belly, trees on my back, nails in my ribs, feet I do lack. What am I?
I have a face and two hands, but I have no arms or legs. Six plus seven is one. What am I?
Brown I am and much admired. Many horses have I tried. Tire a horse and worry a man, tell me this riddle if you can. What am I?
It flows out of the soil, It burns you if it boils, And holds us in its coils, More valuable than gold, As black as it is old.