Here's why a tippe top will spin on its narrow end

Matthias Wandel explains how this self-inverting spinning top will flip over when spun quickly enough.

If you have a lathe, Matthias shows you how to make your own:

If you don't have a lathe, you can buy plastic ones and even fancy metal ones, spelled variously as tippie tops or tippy tops.

Image: YouTube / Matthias random stuff