Abstract: Described is an apparatus for building a junk model, comprising an elongate member (118) attachable to a junk model body (106) and having a first end region and a second end region; a first attachment portion (130) for attaching a first surface engaging element (114) to the first end region; and a second attachment portion (132) for attaching a second surface engaging element (116) to the second end region; wherein the elongate member is selectively adjustable in length to set a distance between the first attachment portion and the second attachment portion. A kit of parts and method of building a junk model are also provided.