This article is about the world from the PC version of Mario's Early Years! Fun with Letters. For the world from the SNES version, see Blending World.
Building World
Building World PC.png
First appearance Mario's Early Years! Fun with Letters (1993)

Building World is a world in Mario's Early Years! Fun with Letters. It is one of the ten islands in the game, one of three that are exclusive to the PC version, and is represented by a baseball bat and the word "Hit".

The world revolves around a baseball game setting, where players must sound out three-or-four-letter words depending on what is clicked on. Various animations occur when the cast is clicked on.