www.pps.org/topics/play (play)
www.gamasutra.com/features/20030127/adams_01.shtml
www.gamasutra.com/features/20030303/kreimeier_01.shtml
www.ilinet.org/contextualmodel.htm
http://museumlearning.com/paperresearch.html
www.whitehutchinson.com/leisure/familyctr.shtml
www.whitehutchinson.com/leisure/historychildren.shtml
www.soulpacific.com/archives/books_books_books/000107.html
http://web.mit.edu/comm-forum/papers/kemper.html
http://www.ecochallenge.com/main.html
http://tangible.media.mit.edu/papers/Tangible_Viewpoints_SG02/Tangible_Viewpoints_SG02.htm
http://narrativity.interactiveinstitute.se/narrativetoys/projects/Publications/ah2002psstipatory.pdf
http://www.x-entertainment.com/takeoverAd.html?http://www.x-entertainment.com/messages/512.html
http://www.promomagazine.com/ar/marketing_retailtainment_today_wow/
http://shop.ronco.com/
http://www.educause.edu/ir/library/pdf/ffpiu0005.pdfholodeck)
http://www.miralab.unige.ch/papers/170.pdf
http://www.transparencynow.com/introlem2.htm