https://www.stolaf.edu/people/hansonr/mo/
https://www.wikihow.com/Make-Models-of-Organic-Chemistry-Molecules
Aha this one http://www.800mainstreet.com/vsepr/vsepr.html
https://www.mathsisfun.com/geometry/solid-geometry.html
https://pubs.acs.org/doi/pdf/10.1021/ed067p556
