Kourtney Kardashian's son Reign is growing up! And how in the world did she give birth to two tow-heads when she and Scott are so dark? However it happened, little Reign looks just like Penelope -- wispy blonde hair and all!

Kourt and Reign visited a friend, on Sunday, Kourtney dressed casually in a Life of Pablo sweatshirt, Adidas wax-coated track pants and Gucci sneakers. Reign was in all-black, with white Vans. Cute!

Reign's second birthday is coming up -- he's a year and a week older than Kim's son Saint. All the cousins are really the next-gen Kardashian Klan! Anyway, good think baby Reign is too young to read, 'cause look at the back of mama's sweatshirt!