For the second part of the class I got the kids to watch the video below and take note of the different colours they see. The calming music really helped them settle after their break and they took to the task with care and consideration. I think this kind of activity would be great for art classes that are scheduled towards the end of the school day.
I showed the students how to carefully apply the black oil pastel onto the watercolour paper (I made sure they were aware that the paper is expensive so must be treated nicely). I then showed the students how to create different effects by allowing the watercolour paint to react with the water that I had already brushed onto the page.