decorating the house

Joseph decided our kitchen was a little too neutral recently and decided to liven it up with a little hot pink crayon on the tile grout. Do I clean it up or just remake the curtains to match.
He was so proud of himself too. I don't know when he did it. I thought I had spilled something and bent down to look at it closer. When I stood up, he was standing there smiling. I asked if he colored the floor and he said, "yes! and over here and over there too!" Sure enough . . . . .