Peanut Puzzle

From the original THingiverse post:

The Peanut Puzzle was invented almost 50 years ago by Stewart Coffin (his design #67). It consists of six pieces, all different. These pieces can assembled into many different shapes. By adding the optional pair of end pieces even more shapes can be formed. Over the years, Stewart Coffin has been generous in allowing copies of his puzzles to be reproduced.

This is a nice puzzle for kids, because there is no fixed goal and it is fun to explore ways the pieces can fit together. Adults will also enjoy the challenge of finding all possible shapes using the six basic pieces.

For more information about this puzzle, including the possible shapes that can be formed, see:
https://johnrausch.com/PuzzlingWorld/chap21.htm#p1

These pieces are designed with an offset of 50 microns (0.05 mm). They were created using a BurrTools export with the following parameters:

Unit size=12.0
Bevel=0.3
Offset=0.05
Thickness=0.0
Tubes size=0.0
Leave inside grooves=off
Leave outside grooved=off
Remove grooves in void=on