Today I made a doll guitar out of the packaging for a doll guitar.
I started with the packaging. You can use whatever you have but I think it would be easiest to start with packaging. The other stuff is in the picture because I was going to make some other stuff.
Cut it out.
Then see if it works.
Draw lines and tape it in.
Cut out some paper for the base and tape it in.
Then cut around it to make it as thin as you want.
Trace around it on card stock or card board.
Put a string on it and you are done!