Reading:
Margot Brereton and Ben McGarry, "An Observational Study of How Objects Support Engineering Design Thinking and Communication: Implications for the Design of Tangible Media," CHI-2000.
Thomas P. Moran, Eric Saund, William van Melle, Anuj Guhar, Kenneth P. Fishkin, Beverly L. Harrison, "Design and Technology for Collaborage: Collaborative Collages of Information on Physical Walls," CHI letters, vol 1, number 1, 1999.