Give a list of at least 15 images you think tuxpaint must have and that it don't has now neither are listed in docs/TODO.txt of tuxpaint-stamps.

See getting CVS for instrucctions on getting the source code of tuxpaint.

If you have any doubts about tuxpaint not specific to this task you can ask in the tuxpaint-devel mailing list. Remember to suscribe before mailing or your mail will be delayed until the mail admin has time to aprove it.