What are you doing there?

A man was walking along when he spotted a small boy busily constructing something. He approached the boy and was shocked to see him playing with cow manure! For lack of anything better to say, he asked, “Little boy, what are you doing?” The boy replied, “I am making George Bush with this manure, Mister.” Now thoroughly taken aback, the man asked, “Why are you making George Bush? Why not make, er, Bill Clinton?” The boy answered, “Oh no Mister, I can’t make Bill Clinton.” “But why not?” asked the man. The boy replied “Well, Mister, there isn’t enough here to make Bill Clinton.”