About Jennifer Y. Sun Jennifer Y. Sun is President and a founder of Numedeon, Inc., the company that launched Whyville.net, an educational virtual world targeted at children ages 8 to 14. Books by Jennifer Y. Sun Beyond Barbie and Mortal Kombat New Perspectives on Gender and Gaming edited by Yasmin B. Kafai, Carrie Heeter, Jill Denner & Jennifer Y. Sun