Tell us about yourself!
That's where your creativity comes in. If you print a case for this project, it can get really small, as one of my friends did. He could fit it in his pocket.
Digitize a Song With ArduinoView Instructable »
The design can be seen on Tinkercad
Fur Elise With Flashing Lights
Fur Elise With Flashing LightsView Instructable »