Tangible menus and interaction trays: core tangibles for common physical/digital activities. - Brygg Ullmer; Rajesh Sankaran; Srikanth Jandhyala; Blake Tregre; Cornelius Toole; Karun Kallakuri; Christopher Laan; Matthew Hess; Farid Harhad; Urban Wiggins; Shining Sun (TEI, 2008)