Answer:
Round as a button, deep as a well. If you want me to talk, you must first pull my tail.
When the son of the water returns to the parent, it dies. What is it?
What can be measured but not seen?
Add a T and I shoot through the sky. Then add an S and I multiply. What word is it?
Iβm a word, six letters longΝΎ I sometimes enter with a gong. All in order from A to Z, I start with the letter B. What is the word?
I'm the source of all emotion but I'm caged in a white prison.