Answer:
I can wave my hands at you but I never say goodbye. You are always cool when with me even more so when I am high!
I have 24 keys but cannot open any locks. Sometimes loud, sometimes soft. What am I?
How many letters are there in the English alphabet?
Deep, deep, do they go. Spreading out as they go. Never needing any air. They are sometimes as fine as hair.
I am an instrument that you can hear but cannot see or touch. What am I?
The answer I give is yes, but what I mean is no. What was the question?