Gifts4Kids demonstration video (old)
Old WIP version of the Gifts4Kids mod. It has been improved much since, but this should give you a good idea of how it works.
Video is here: http://s18.photobucket.com/albums/b120/iamerik/stuff/?action=view¤t=Gifts4Kids_0001.flv
NOTE: As of V1.1 the comment about there not being any karma rewards is not true anymore.