The Box Thing is an Item, one of four Things used on the Wooden Thing to travel to the next world. It spawns naturally in every world in its own Set Piece. It is surrounded by Stone Walls and Evil Flowers along with a Gnome and Spear on a small patch of Rocky Turf.
- Wickerbottom says the Box Thing is an electrical charge regulator. Wilson says that a Box Thing may control the polarity of the whole universe.
- The Box Thing's location resembles Stonehenge - geometric with stone walls.