Answer:
I am whole but incomplete. I have no eyes, yet I see. You can see, and see right through me. My largest part is one fourth of what I once was.
What kind of table has no legs?
What has 4 legs in the morning, 2 legs in the evening and 3 legs in the night?
What surrounds the world, yet dwells within a thimble?
What instrument can make any sound and be heart, but not touched or seen?
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?