The big differance between Kid Pix and Tuxpaint is there is not a select tool that allows any part of the screen picture to be moved from one place to another. It would help put Tuxpaint in more schools.
Logged In: YES
FYI: select/copy/paste is being implemented as part of the 2008 Google Summer of Code program.
Why this feature is not implemented/merged to tuxpaint?
I tested ReillyBaron_Watson.tar.gz patch against version 0.9.20 and I can select region and copy it. Making new selection crash the tuxpaint (reproducible) , so it is not fully workable patch, but maybe good start.
Along with copy/cut/paste within Tux Paint, it should support inter-application clipboard, to allow part of a Tux Paint picture to be pasted into another program, or vice-versa.
Finally, it would be useful to be able to convert a selection into a stamp, so it can be pasted later, and manipulated using the Stamp tool features.