Mockup

[Sarah]

In manufacturing and design, a mockup, or mock-up, is a scale or full-size model of a design or device, used for teaching, demonstration, evaluating a design, promotion, and other purposes. A mockup is called a prototype if it provides at least part of the functionality of a system and enables testing of a design.

[Renato]

a full-size model of something large that has not yet been built, showing how it will look or operate:

[Magaret]

A model or replica of a machine or structure, used for instructional or experimental purposes.