Answer:
What is at the end of every rainbow?
Hearing something unexpected or touching a live wire can have this effect.
Tickle with your fingers and a song it will sing. Be careful, though, you may break a string. What is it?
My second is performed by my first, and it is thought a thief by the marks of my whole might be caught.
What time is spelled the same forwards and backwards?
I am the fountain from which no one can drink. For many I am considered a necessary link. Like gold to all I am sought for, but my continued death brings wealth for all to want more.