Writing a Letter to the Sun

Last night Isaac didn't want to go to bed. "The sun doesn't want to go down!!!!! The sun wants to stay up!!!!!" I suggested that since the sun was already down (as in, behind the trees and we couldn't see it anymore even though it was still light outside), we could write the sun a letter when it comes up again.

So this morning (way after the sun came up) we wrote the sun a letter. And we told the sun that Isaac gets sad when it goes down, etc, and put it in an envelope and stamped and addressed it, and took it to the mailbox and put the red flag up so the mailman knows there's a letter inside.

(Um, Grandpa...when you get the letter to the sun, could you write back and explain why you--the sun--need to go down and that it's okay for Isaac to go to sleep or something? Thanks. That would help a bit I think.)