Answer:
Why is it so easy to weigh fish?
What has 4 fingers and a thumb but isn't alive?
Flat as a leaf, round as a ring; have two eyes, can't see a thing. What am I?
The more you have me, the less you see. Shine a light on me and I flee. What am I?
With a halo of water and a tongue of wood, stone as skin long I stood. What am I?
I stay where I am when I go off. What am I?