Answer:
What is something that can go up quite easily, but is not as easy to bring back down?
What has a head, a tail, is brown, and has no legs?
What is between heaven and earth?
A tiny bead, like fragile glass, strung along a cord of grass.
I'm the son of water but when I return to water I die. Who am I?
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.