Chimp "Girls" Play With "Dolls" Too—First Wild EvidenceNature and nurture may both influence gender-based toy choices. It's almost Christmas, and, as the song goes, Barney and Ben hope for Hopalong boots and a pistol that shoots, while Janice and Jen would like dolls that will talk and go for a walk. Now new research suggests that such gender-driven desires are also seen in young female chimpanzee