During your internship, you’ll work with one or more developers as mentors. You’ll do a lot of reading and not just on technical subjects (e.g., Start with Why). On the technical front, you’ll be working various projects, writing blog posts aobut them, and giving talks on your work (and posting videos of them), contributing to Open Source projects, building your StackOverflow Reputatio, and much more. Certainly, you won’t be making copies or fetching coffee for anybody.
Also, like everybody else in the company, you’ll be part of celebrations, birthdays, Friday Talks, Food Friday, etc.