Although having a natural intellectual ability, girls often shy away careers in science and engineering. Negative stereotypes about women's intellectual abilities occur in children as young as 6-years-old and can shape a child's education path and career choice. The current study has two aims, firstly (a) to explore pre-existing gender stereotypes in 6, 7 and 8-year-old girls and (b) an intervention that exposes the girls to successful female role models in STEM. The findings indicate that exposure to stories about women who have changed the world in science, can counter negative stereotypes concerning female's intellectual ability. Pre-existing stereotypes such as “girls are nicer” are prevalent in most participants and were not affected by the current intervention. Thus, a child that learns about other members of their own gender accomplish success in this field may improve confidence in their own intellectual ability.