John Maloney Mitchel Resnick Natalie Rusk Kylie A. Peppler Yasmin B. Kafai Media designs with scratch: what urban youth can learn about programming in a computer Clubhouse. 81-82 2008 ICLS (3) http://dl.acm.org/citation.cfm?id=1599974 conf/icls/2008-3 db/conf/icls/icls2008-3.html#MaloneyRRPK08