Do you remember that there is a painting style characteristic of neo-impressionism - pointillism - when the picture is painted with small colored dots. Let your child try this style by making dots in the paper using an awl found in any office. Dots can be used in abstract designs, ornaments, or to frame a beautiful painting.
Then ask your child to use a felt-tip pen to draw a picture with small colored dots. If your child is interested in this activity, take him to a museum and try to find paintings made using the pointillist technique, for example, works by the French pointillist artist Seurat.