:~$ perl  lock-keyboard-for-baby.pl                                                                     
Can't locate Gtk2.pm in @INC (@INC contains: /usr/lib/perl5/5.8.8/i486-linux-thread-multi /usr/lib/perl5/5.8.8 /usr/lib/perl5/site_perl/5.8.8/i486-linux-thread-multi /usr/lib/perl5/site_perl/5.8.8 /usr/lib/perl5/site_perl .) at lock-keyboard-for-baby.pl line 118.
BEGIN failed--compilation aborted at lock-keyboard-for-baby.pl line 118.