What's a Skinner Box?
        https://en.wikipedia.org/wiki/Operant_conditioning_chamber

Cool.  How can I make one at home, since the laboratory versions break the bank?
        https://people.hofstra.edu/Oskar_Pineno/ArduiPod.htm
                    https://www.youtube.com/watch?v=zA7dPL4tvN8
        https://blog.adafruit.com/2014/06/06/make-a-skinner-box-to-condition-your-pet-rat-with-a-raspberry_pi-raspberrypi-piday/
                    http://www.kscottz.com/open-skinner-box-pycon-2014/
                    http://www.thingiverse.com/thing:296335
                    https://github.com/kscottz/SkinnerBox
        http://3dprint.com/106669/3d-printed-lab-equipment/
                    http://analisisdelaconducta.net/?page_id=496
                    http://www.thingiverse.com/thing:1246025
        https://github.com/oliverk71/ChickenBox
                    https://www.youtube.com/watch?v=Su4_4AtoatU