Answer:
What instrument can make any sound and be heart, but not touched or seen?
There is one word that stands the test of time and holds fast to the center of everything. Though everyone will try at least once in their life to move around this word, but in fact, unknowingly, they use it every moment of the day. Young or old, awake or in sleep, human or animal, this word stands fast. It belongs to everyone, to all living things, but no one can master it. The word is?
Runs smoother than any rhyme, loves to fall but cannot climb!
At first, I am nothing. Add something to negate. Add again to oppose. Add again to find the time to draw. Add once more to find nobody at all.
This is in a realm of true and in a realm false, but you experience me as you turn and toss.
I start with T end with T and within me is T.
Difficult
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?