Answer:
Weight in my belly, trees on my back, nails in my ribs, feet I do lack. What am I?
A piece of paper that takes most people 3 or 4 years to get.
I work when I play and play when I work. What am I?
I am all around, yet to me you are half blind. Sunlight makes me invisible and difficult to find. What am I?
I am the noblest musical instrument
The answer I give is yes, but what I mean is no. What was the question?