First I took our dot marker set, which includes 6 colors, and dotted each side of a 1 inch wood block with each color.
Then C and I took turns rolling a number die and the color die. If we rolled a "3" and a "teal" then we would put 3 teal dots on a piece of paper. We weren't making any special pictures, we were just going to play until the paper was filled up (or until C was done with the game) But you could play with any dot marker printable out there, or make a picture as you go.
We ended up filling up almost the entire paper.