Answer:
What word is a plural, but when you add an "S" to the end, it becomes singular?
What instrument can make any sound and be heart, but not touched or seen?
The man who made it didn't need it. The man who bought it didn't use it. The man who used it didn't want it.
I love to dance and twist and prance. I shake my tail, as away I sail. Wingless I fly into the sky.
A circle of stones, never in rows. Stacked one on the other, mystery it sows. What is it?
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?