A double play set increased the similarity of boys' and girls' play. Play with same-sex figures was more likely in the presence of an opposite-sex peer. Boys' play was more strongly sex typed than girls' play. Play sessions were videotaped and later analyzed according to frequencies of uses of figures and objects.
Same-sex and opposite-sex pairs of boys and girls were observed while they played for 10 min with sex-typed and neutral Playmobil figures and objects.
A sample of 108 boys and girls between 4.0 and 6.0 years of age participated in an experiment designed to examine the effects of sex of participant, sex of peer, and a single versus a double play set on the children's play behavior.