And if the Mamluks hadn't stopped another of Genghis's grandsons at the Battle of Ain Jalut, they probably would have taken all of North Africa. Man, Genghis Khan sure had a lot of grandkids. Well, it must be time for the open letter. An Open Letter to Genghis Khan's Descendants. Oh, but first, let's check what's in the secret compartment today. Oh, a noisemaker and champagne poppers. Stan, you know I suck at these.