"A didactic painting program for children."
As you can clearly tell from the name, Tux Paint is a painting program for young children, able to not only entertain them, but also to teach them how to use the basics of the computer. This way, in addition to being a game, it has a clearly didactic character.
Tux Paint presents a simple interface but it is complete (in many languages), with a fixed size window that offers access to the previous images using thumbnails. As it is clearly for children, Tux Paint has some tools from graphic editors, accessible from very big buttons and ones that are easily identified. And all this for free and easy to download. Your kids will appreciate it!
This Tux Paint program is actually used in schools around the world as a computer literacy drawing activity. It runs on a variety of platforms, including all versions of Windows (including Tablet PC), Mac OS X 10.3 and up, Linux, etc. It is also very easy to download, install and then use, through its friendly and intuitive user interface. You don't need any technical experience at all to get the most out of it.