Can You See the Writing on the Wall?

So, I was unpleasantly surprised this morning. After coming downstairs, I was greeted by Emma saying, "Mommy, come with me. I have to show you somepin." I was directed to the living room and shown the "surprise". Henry had taken a dry erase marker and had scribbled on two walls. Needless to say, the little old man was corrected right away and will be helping wash the walls. We have never had this problem with either of the kids until today. Sure there was the poop on their cribs and bedroom wall when they were little, but since then nothing even close. And we solved that issue. They are allowed to watercolor on their walls with supervision. So perhaps his reasoning was that he was bored with the white walls. Still a big NO, NO!!! So we will scrub today and hope that it comes off because interior painting is still on hold for a bit longer.