Off Switch

When I picked Zack up from school today the sun was shining brightly in the sky. Apparently by the time we had walked to the truck, gotten in, buckled up, and drove across the parking lot Zack had enough of that big ol' ball of flames.
"Hey Mom."
"Yes Zack."
"Is there an off switch?"
"An off switch? An off switch for what Zack?"
"The Sun, it is just to bright and I can not see a thing!"

So if anyone knows where the off switch it, Zack would surely like to know.