Holding this crayon:
And my walls look like this:
My instant response was to grab the crayon and ask why? After his crying outburst he told me that the walls just looked so plain - he wanted to decorate them for me.
He is the sweetest child! So I gave him lots of hugs, reassurances that he didn't do anything that awful (crayon does come off), the artwork was beautiful (but should be on paper) and most importantly, I love him no matter what! Then I gave him the Mr. Clean Magic Eraser and put him to work: