Smart spaces, pervasive computing and ambient intelligence are different terms to allude to the capabilities of ‘adaptation’ and ‘responsiveness’, to provide the right service in a timely, unobtrusive and friendly manner. When conceiving a smart application, it is key to define how to seamlessly, effectively and securely interact with the user both to gather the appropriate information and to provide the required service. To date, most practical interaction strategies in smart spaces have relied in the use of mobile devices as mediators (e.g. mobile augmented reality). Recently also a number of methods based on “natural” interfaces (such as tangible ones in smart objects) have been proposed and demonstrated. This workshop focuses on advances in technologies and concepts enabling novel interaction models to link the physical and virtual world layers in smart spaces, to create innovative applications which make intensive use of ambient and personal information to deliver value to their users. Our goal is to organize a forum for attendees to share experiences and discuss novel ideas for easy, friendly and effective interaction in smart spaces.