Tux Paint is a free, award-winning coloring program for kids ages 3 to 12 (for example, preschoolers and elementary school kids).
Tux Paint usesby 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.)
Η application 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/