You might never notice, but some Nintendo games have loads of mechanics, ideas and concepts that are effortless introduced as you play. How do they do it? It's something called Kishōtenketsu.
Kishōtenketsu is an Asian philosophy of narrative design that uses a four stage process: introduction, development, twist and resolution. This video explains how it's used in several Nintendo games and how Koichi Hayashida in particular, the director of several 3D Mario games and more recently producer on Captain Toad: Treasure Tracker, developed it.