For my 101st post I'm giving you another incredibly simple instrument that you could build yourself in a matter of minutes.
With just a stick/bolt/pole going through a can/pringle tube/anything you can use a small cupboard hinge as a bridge/whammy bar hybrid.
You could have it one stringed or just simply loop the same string around and have a 2-stringed version.
Play with the hinge to alter the pitch, pluck it or bow it, easy peasy!