Here are six triangular tiles each of which contains two half owls and half a guitar. To solve the puzzle arrange the triangles into a hexagon which shows six complete images in the interior, either 6 owls or a combination of owls and guitars. The image included above shows a solution containing two guitars and four owls. I believe there are 122 different solutions to the puzzle.
The half images come from MaakMijnldee's cookie cutter collection (thing:35495) and the numerals from the font ArchitectsDaughter by polymaker (More Fontz thing:13677). Both sets of images were converted to openSCAD polygon commands for ease of use. OpenSCAD code is included.
The tiles are best printed directly on the build platform.
Some possible exercises:
Find one of the 4 solutions containing 6 complete owls.
Find one of the 12 solutions containing 3 complete guitars and 3 complete owls.
Find the 2 solutions where the 6 unmatched numerals at the outer edges of the hexagon sum to 30. The sum from the example given above is 17.