Coloring bitmap sun
Draw the sun differently. In this figure, the sun is depicted as a circle with a separate triangular rays. Each ray can have your own color or can be painted with a linear gradient with a certain slope. It is a matter of taste, the most important thing, do not you like and the picture became more cheerful, it's the sun that shines and happy people. Paint myself playing with sun flowers and the soul brighter and more joyous
Coloring in a raster (pixel) format. If you use a graphics editor such as adobe Photoshop, then using the fill can easily paint a picture. Outlines for coloring perfect to spend some time coloring on the computer. For children this can be fun and not an obsessive study of the work in the graphic editors, and knowledge of the world in different shades and colors.
Coloring can be printed, and then paint.