Ideas for Drawing and Colouring with Pencils, Crayons, and Paint
Merging colours is one idea on the Faber-Castell web site that I thought would work for an art appreciation lesson.
Fibre-tip pens can be used in many of the same ways as colour pencils, and they are also useful for learning about secondary colours. For this we use a pointillist technique, with lots of little dots. Try it with just the primary colours red, blue, and yellow. If you stand back, then the individual dots are no longer perceived as such, but merge in the eye to form secondary colours. This effect is also used in colour printing, as a magnifying glass will show. Oranges coloured with red and yellow dots appear orange, yellow-and-blue leaves look green. This technique is very suitable for pictures of natural objects, sketched out beforehand with a soft pencil or a pale yellow fibre-tip pen.