I had pre-mixed 25+ colors.....students carried one jar of paint around the room and added their color to each mural a little at a time. Some of the older students went around helping me touch up the black outlines as the paint dried. I did have to spend a little time after the session to touch up the black, but it was worth it. Each one-hour session completed 5 murals....that is 10 large art displays in the hallways! The cityscape below was inspired by James Rizzi!