My project is to make an automated instrument, the instrument I chose was a kalimba. 

Prototype plucker :

I am going to be using servos to play the instrument and have those controlled by the arduino. I am going to have a few songs built into the device and also have the ability for people to program their own songs.

The technical challenges are constructing the arms that allow the kalimba to be played.

The aesthetic challenges are hiding the electronic bits and making the linkages look pleasing. I may also add some lights that play along with the songs.

We have 4 weeks left as of this writing:

• Week one 
• Finish constructing box for servos and holder for kalimba 
• Week Two
• 3d print pluckers 
• Week three
• Code
• Week four
• Install lights and create user interface ( buttons )
• Finish odds and ends

http://www.makercase.com