Painting bricks on the castle walls

Today the girls painted the exterior of the castle.  The girls who did the painting are 12 and 9 years old, respectively.  To simplify things, I had them paint the entire exterior pale grey (I used latex primer with a bit of artist's acrylic black added).  Then they "stamped" blocks on the outside using small pieces of cellulose sponge -- we had four colours:  dark grey, light grey, medium brown, light brown and they just alternated colour randomly.  It worked much better than I thought it would!

We set the block colours out on paper plates:  each colour had its own plate and sponge: