Apples

Apples, otherwise known as Dig-It Houses or Malus Domestica by professionals, are fruits that exist.

It is mandatory for every single Dig-It to inhabit one, otherwise they would lack the ability to excavate in the first place, due to the fact that these fruits are required for them to break through the ground easier. If you ever studied Dig-It Anatomy in college, you would know this already. This has not yet confirmed but before the Dig-Its gained their famous aptness of digging, they did not inhabit apples. Once a Dig-It inhabits one, it automatically tastes like a lemon instead and becomes repulsive.