Answer:
I am something that floats. But after a period of time I fall.
Timmy's mother has three children. The first was named April. The next was named May. What is the final one's name?
They live only in stories, taller than three storeys.
I weaken all men for hours each day. I show you strange visions while you are away. I take you by night, by day take you back. None suffer to have me, but do from my lack.
There are two monkeys on a tree and one jumps off. Why does the other monkey jump too?
As round as an apple. As deep as a cup. All the king's horses can't pull it up.