At half term, we were in the studio with our eldest and our youngest.
Our youngest played with toy animals for over an hour, moving, arranging them, carefully lying each one on its side under the table.
When a pause came in this game she saw 'oh, a great big bit of paper.' She took up the charcoal and began making her marks. Her sister joined her. After a few minutes the elder decided it was done, and the younger agreed.