%0 Conference Paper %B DiGRA \&\#3911 - Proceedings of the 2011 DiGRA International Conference: Think Design Play %A Tiemstra Gordon %A van den Berg Ren\&\#233e %A Bekker Tilde %A de Graaf Mark %T Guidelines to Design Interactive Open-ended Play Installations for Children Placed in a Free Play Environment %@ ISSN 2342-9666 %D 2011 %2 http://www.digra.org/wp-content/uploads/digital-library/11301.09300.pdf %I DiGRA/Utrecht School of the Arts