I am planning a science lesson on surfactants (the type of molecules that make up detergents) and I am looking for a 3D model that I could print as a teaching aid. My preferred format would be .stl. Has anyone seen such a model? A nice schematic diagram of surfactant molecules can be found at this link: https://4.bp.blogspot.com/-zGboyVeAPTY/WjOXyi7ekBI/AAAAAAAAAHw/8DCIPfgSVQUBkam2MXZVHUd2mrjQY-DGACLcBGAs/s1600/Y%C3%BCzey%2Baktifler.jpg
The design is fairly simple an perhaps there is something out there that is close that I could manipulate myself (I am a novice).