The emergent application area of Ambient Intelligence provides new opportunities in the field of social interaction, and new means to conceive and design novel interface solutions for accessing social technologies. The maturity of technologies such as motion tracking, gesture recognition, facial expression and emotion recognition facilitate natural interactions with intelligent environments by providing technology newbies with more inclusive and universal interaction modalities. The workshop proposes the application of a Human Centered Design framework useful to conceive and design novel interface solutions for human activity sharing. Through an iterative process, participants will practice HCD methodologies and techniques and will define visions and concepts for our future life environment. From this workshop, participants will acquire multidisciplinary knowledge related to the Ambient Intelligence area, experiment an iterative process that can be adapted to other research topics, and structure concepts useful to start new investigations and developments.