This thing in the photo is the brainchild of participants in the Adafruit modders forum named Stephanie.
Main features: - Time and date. - Humidity sensor. - Light sensor. - Alarm clock. - Timer. - Metering for photo exposure. - Compass. - GPS (coordinates, height + tracker, distance, average speed, time). - Highlighting. - Data galvanic skin response. ')
Under the cut more photos + list of what you need to collect such a thing for yourself.