Answer:
Weight in my belly trees on my back nails in my ribs feet I do lack.
The more of me there is the less you see.
I can be swallowed, but I can also swallow you. What am I?
From house to house I go, sometimes narrow, sometimes wide. Whether there's rain or snow, I always stay outside. What am I?
Glittering points that downward thrust. Sparkling spears that never rust.
I never sleep yet sometimes I weep. I can get angry or just be happy. Wherever you go, I will follow. No matter what you do, I will be there. I cannot die. What am I?