If you have issues with your kids drawing on the walls, you might pick up on of these Jot Dry-Erase refrigerators. Which allows for them to draw to their heart's content without doing any permanent damage.
About a year ago I wrote up a similar fridge, however, it was sadly only sold in Brazil. This one is actually available here in the US.
It is being sold for $549, just make sure the munchkins don't wander off and make all of your other appliances pretty colors. The best part is that if you look closely at the photo, the little girl is writing on the fridge “I will not write on the wall.”