Three year old wisdom

While shopping at Target yesterday we passed the garden section and Aidan pointed to the giant bags and asked;

"What are those Mommy?"
"Bags of soil", I replied.
"What is soil?"
"It is a type of dirt."
He then countered with, "Who would buy dirt in a bag when you can get it outside? That's silly Mommy".

And Mommy didn't have an answer because she was laughing too hard.