The Tongue is an item in Behind the Scenes. In the chapter, it acts as some sort of paintbrush.
Obtainability[]
In order to get the tongue, the user must go behind the set and unscrew the screws by using the penny.
Story[]
After obtaining the tongue, the user uses it to pick up the yellow paint and color the moon yellow, thus creating a full moon.
After unlocking the "Dev Only" door, the user uses the tongue to lick away the ice cream so that they can grab and use the cone.