Cursor over parts to see sizes
all centimetres unless stated otherwise

string

strong-thread-or nylon-fishing-line
(up-to-1 metre-long)

drawing-pins

to-secure-ends
of-string

neck

softwood
1-x-1-x-59?

frets

matchsticks
cut-in-half

sound-box

plastic-cup
(could-be-paper cup,-yoghurt-pot, margarine-tub-etc.)

frame

softwood
1-x-1-x-14+

frame

softwood
1-x-1-x-11