Stanley's Grandpa knows absolutely everything about everything. Whatever you ask him, he always seems to know the answer. But a little-known fact about every Grandad in the world is that when they don't know the answer to your question, they make something up out of thin air. It may be a load of utter hogwash, but it's always entertaining. Why Is The Sky Blue? is the very first story from The World According To Grandpa series.