Answer:
Sleeping during the day, I hide away. Watchful through the night, I open at dawn's light. But only for the briefest time, do I shine. And then I hide away. And sleep through the day.
A tree with 5 branches, no leaves and no fruits
A hill full, a hole full; yet you cannot catch a bowl full. What is it?
When the son of the water returns to the parent, it dies. What is it?
I am the tool, for inspiring many. Buy me in the store, for not much more than a penny. Don't overuse me, or my usefulness will go.
Which bank is not used for storing money?