The SnowGlobe can be conceived as a presence lamp that displays light and snow. Whenever a close relative, who also has a globe, is moving in the proximity of his/her globe, the globe lights up and shows snow fluttering, the intensity depending on the amount of movement detected. Additionally a user may nudge their relative by shaking the globe, making it snow and light up intensely for a short period of time in the other globe.
Reference: Visser, T., Vastenburg, M., Keyson, D. SnowGlobe: The Development of a Prototype Awareness System for Longitudinal Field Studies. In DIS 2010
http://www.ijdesign.org/ojs/index.php/IJDesign/article/view/710/371
