Answer:
What is flat, usually square, and made from trees but isn't wood?
There are two fathers and two sons. They walk into a candy store and each buys a candy bar for 50 cents. The total for all of the candy bars was $1.50. How is that possible?
What never ends but you always have it
There are two monkeys on a tree and one jumps off. Why does the other monkey jump too?
He prefers to travel on vines and pal around with gorillas.
Before I grow I'm small. When I'm old I grow tall. When I die I give a mighty fall.