A little boy and his grandfather...

...were walking through a meadow on a beautiful summer day.

"Grandpa," said the boy, "why is the grass green?"

The old man shrugged. "No idea," he grunted.

Then the boy asked, "Grandpa, why do the flowers smell so nice?"

"Beats me," said the old man.

"Grandpa, what makes the wind blow?"

"No clue."

"Grandpa," said the boy, "do you mind me asking you all these questions?"

"Of course not," said the old man. "How else will you learn anything?"