Do you have small children? Have you made the move to OSX? Do you and/or your kids miss KidPix? Then I strongly recommend that you try Tux Paint. Tux Paint is a paint application that is aimed towards young children (similar to KidPix). Tux Paint features basic drawing tools, designs, colors, and a downloadable stamp set. Tux Paint is Open Source software and released under the GNU General Public License (GPL). Yes, that means that it's 100% free.

"Tux Paint is a drawing program for young children. It has a simple interface and fixed canvas size, and provides access to previous images using a thumbnail browser (e.g., no access to the underlying filesystem)."

"Unlike popular drawing programs like 'The GIMP,' it has a very limited toolset. However, it provides a much simpler interface, and has entertaining, child-oriented additions such as sound effects."