“…Sex-typed toy preferences have been demonstrated in children as young as 1 year old (Alexander, Wilcox, & Woods, 2009;Campell, Shirley, Heywood, & Crook, 2000;Jadva, Hines, & Golombok, 2010;Serbin, Poulin-Dubois, Colbourne, Sen, & Eichstedt 2001;Snow, Jacklin, & Maccoby, 1983) and, by their third birthday, girls are much more likely than boys to play with dolls, dolls' houses, tea sets, and other domestic toys whereas boys most often play with toy guns, swords, cars, trains, and trucks (Hines, 2010a;O'Brien & Huston, 1985;Pasterski et al, 2005;Ruble, Martin, & Berenbaum, 2006;Servin, Bohlin, & Berlin, 1999;Sutton-Smith & Rosenberg, 1971). By this age, girls also prefer girls as playmates and boys prefer to play with boys (Howes, 1988;LaFreniere, Strayor, & Gauthier, 1984;Maccoby & Jacklin, 1987;Pellegrini, Long, Roseth, Bohn, & van Ryzin, 2007).…”