I just wished I had this when attending the graph theory classes at Uni...
Professor: Today we will review the properties of the Petersen Graph...
Student: You mean this right? *shows Golden Star Puzzle*
Its properties are that it is made of golden, silver and bronze
colored telescopic rods connected with metal rings!
Professor: ...
Student: Look! I can prove it is non-planar!!!
Professor: And how do you plan to do this?
Student: The rods, have a diameter of 8mm!!!
Professor: *faints*
Pantazis