Much attention has focused on the lack of diversity in access and participation in digital media available to youth. Far less attention has been paid to the diversity of youth creators and the content that is produced by youth. We examined the diversity of project creators, content, and comments in one of the largest youth programming sites called Scratch (scratch.mit.edu), with over 7 million registered members between ages 6-16, over 10 million posted projects and 16 million comments. We used keyword and webcrawler searches to reveal that only a small number of users (<.01 %) self-disclosed their racial and ethnic identities. Case studies further illuminated how project designs and comments delved into race, provided cultural critique or addressed racial harassment. In the discussion, we address these blind spots of diversity in massive online DIY youth communities, discuss methodological limitations, and provide recommendations for future directions in supporting diversity.