Printing
Filament: PLA
Nozzle:  0.4mm
Layer Height:  0.2mm
Perimeters:  3  (Makers Muse settings: https://www.youtube.com/watch?v=mE521Q4H6aY)
Infill:  10%
Time:  53 min per 1 block
One of each block except #1024 – print 2x #1024.

Original
The original set is at Thingiverse  https://www.thingiverse.com/thing:4387531
It includes an excellent pamphlet giving some background and listing 40 different puzzles of 6 blocks.  It includes a tray for storing the puzzles in.

This Variation
The original offers 3 sets having different notch widths.  I found even the tightest set to be rather loose so I offset the notch faces by 0.07mm. 
As printed they are a bit tight.  Put them in a plastic bag with some talcum powder & shake them up.  It makes the PLA non-sticky & the blocks slide together nicely.

Background
A very good site discussing puzzles http://www.robspuzzlepage.com/interlocking.htm#notchable
It was that site that led me to the Thingiverse set.  
There is another set there of 9 additional blocks.
There are some at Printables.
This is a well documented alternative  https://www.printables.com/model/206641-extended-altekruse-puzzle-set
It links to this definitive site  https://www.puzzlehub.org/puzzles/suggested-puzzles
Coffin’s book  https://johnrausch.com/PuzzlingWorld/chap05.htm#p1

Guide to solving the puzzles.
Included in the download is a pdf guide to solving the puzzles