Students began by using a wet-on-wet watercolour technique to create a background. I then gave them all a drawing of a fish which I had prepared in advance. They (or their carers) cut it out and they then began covering it in torn foil paper.
This activity was nice and simple to explain and the students became very absorbed in gluing down the paper.
Only drawback is that the reflective foil makes the pictures hard to photograph!
