My first idea was to make a music box, but I change my mind and will do selfie-robot.
The aim of the project is to create a robot that finds talking people by listening to their voice and making a photo of the person by automatical face recognition.
First of all you need to think about all parts of the project.
Creating a scheme and first models
Drawing scheme to understand how you will connect all parts
Paper model. You should decide were and how you put all details and about stability of the model
Original sized model allows us see the final position of the parts
First prototype doesn't work as it's shown at the scheme. It has two line sensors and it moves on black surface taking white strip between sensors.
When camera catch the face - it doesn't stop it just takes photo. That's why you can see that the photos isn't clear.
My electronic circuit board designed in Eagle looks like this: 
For laser cutter I save file in .dxf
After cutting have done some operations. I wrote about it in my previous weeks.
Here is the files: