Homemade talharpa (or tagelharpa, stråkharpa, jouhikko) with 2 strings. Torsion tuning system. All materials bought in a local hardware store. Material costs about 10 euros.
Originally I had decided to make it with 3 strings, but it turned out that I mostly only played on 2 strings at the same time, so I decided later that 2 strings was enough, just 1 melodystring and 1 dronestring.
I have tried to build a bow too, but it didn't work so well. Instead I use a flower stick greased with resin. That is very easy and it works good.