Contraptions is the term for machines, buildings, and prop based weapons made by players in-game.
Although the term contraption is used for all players' creations in-game, many type of them exist.
Basic contraption are generally built by new players. They are the most easy to build and manipulate. They can be statues or any another simple creation that don't even have names.
Depending on the player, there may be extremely complex structures or very simple structures.
These are created by persons that have forts or want to test and create new weapons .