This is my original creation. This toy consists of linkages and penguin figurines. The rivets are optional and can be replaced by bolts or twines. The uploaded files comprises the raw editable 3D drawings (3mf format) and the merged 3D drawings meant for importing into the slicer software for 3D printing. Please use the the files with the "-merged" suffix for printing. The 3D drawing of the complete assembly (penguins-assm) is for reference to show the complete layout. Do not use it for printing. The 3mf files with the "um3-" prefix are not 3D drawings but are Cura project files with the 3D printer settings.
I have successfully printed a complete set, painted the parts and assembled them as shown in the photograph.