Lets build a beanstalk

Just bits and pieces of mine and Jamie's conversation on the way home from preschool...

"Mama, let's make a beanstalk,"
"Okay, how do you do that?" I asked, to prompt him to think.
"You use beans," then after a long pause, "and you put them in the dirt,"
"uh huh...you're right"
"like trees...and grass,"
"that's right, like trees and grass."
"and cars."
I turned and looked at his grinning face.
"No, I don't think you can grow cars from seeds..."
"A house? With the rain?"
"I wish."