I always wanted to create a user interface for a mobile app. I've been designing for the past 2 years and not once have I worked for a mobile app, most of my time in the summer break was consumed by watching KhanAcademy's calculus videos because I'm in senior year now. That's when I noticed that KA doesn't have a android application. Well, let's say that the rest of my summer break was consumed in making this UI. 

Here's the YouTube video of me designing one of the elements.