Sorry

My oldest has an interesting way of expressing himself. 

While driving I became so frustrated with him, over what… I cant remember.

When we arrived home he said, “look at the window,” then walked into the house.

This is what I saw:

In the midst of the dirt and grime on the window the word sorry, spelled in bendaroos.

He was able to spell the word backwards and switch every letter so that it read perfectly from the outside of the car.