A mock-up is a replica of an object (existing or not), so that the structure of the copy is identical to that of the original object, but with a different size.
They are replicas of some object, but little faithful (that is to say, with little details and similarities towards the original). Their goal is the fun of children.
When an inert being (usually buildings, cars, trains or planes) on a small scale interact with a woman:
Unlike toys, these objects are faithful replicas of humanoid beings (they may be real or fictitious humans, such as animé characters), though mostly they are about anime characters. Its end is the collection, generally, for the geeks-otakus.