Prepare crayons (several of each color) and place them on a table. Hang coloring pictures on the wall (so that students can reach them) everywhere in the room.
Say the name of a student and a color. The student has to run to the table, take the color and choose a picture to color. He or she colors a part and sits down again.
To not have the other students waiting and make the things more fun, call many names at once with different colors or with the same color).
You can fix a time limit like 5-10 seconds or longer. The child runs back, puts the crayon on the desk and the next children complete the picture.
Once finished, look at what the coloring pictures look like after the game.