Kids and Gender (IMAGE) Michigan State University Caption A study led by Michigan State University found that boys and girls had no problems being friends together but for some reason had a perception that only boys played with boys and girls played with girls. Credit Michigan State University Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.