Just as important, how much did the intern learn while building it? Sounds like they got to touch a number of different APIs, libraries, and concepts.

A stupendous amount. Before starting this project I had never done any complex frontend stuff. Pretty much just HTML CSS and a bit of jQuery.

With this one project I learned about backbone, marionette and the limits of what can be done on the frontend. It was quite a big learning curve, and even now I'm still discovering where the correct balance of frontend-back end stuff is.

Overall a great experience, really opened my eyes to the power of JavaScript, before I had adamantly stuck to nothing more exciting than HTML forms with JS validation.

About two months off and on.