Tux Paint is a free, award-winning coloring program for kids ages 3 to 12 (for example, preschoolers and elementary school kids). 
Tux Paint is used by school students around the world to gain digital design skills. It combines an easy-to-use interface, fun sound effects, and an encouraging cartoon mascot that guides children as they use the program.
Children are provided with a blank canvas and a variety of drawing tools to aid their creativity. (See her full list of features.)
Tux Paint runs on Windows, macOS (10.10 and later), Linux, Android, Haiku and other platforms.
Download the application on the platform you are interested in
https://tuxpaint.org/download/
