This is a fretted "folk fiddle" from less than $5 worth of materials. We are building an orchestra made up of these instruments...
Here's a recording...
Here's a short video of goings on at the workshop.
Step 1: Materials
The main spine is 19 x 25 hardwood (3/4 x 1")
Here are the rest of the bits.
Step 2: Shape the Pieces
There's a lot more to say about this. There are a lot of ways of doing it...
Step 3: Put It Together
The bridge has a shallow "v" on the bottom of it which allows the bridge to rock slightly.
Step 4: String It Up
The plain strings are looped and twisted. The wound strings are tied with a single half-hitch.
Step 5: Variations
The 4 string version has the standard triangular fret board profile.