Taylor unveils a diorama of his soda shop proposal to entice the town meeting into agreeing that Stars Hollow needs one.
A diorama is a replica of a scene, typically a three-dimensional full-size or miniature model, sometimes enclosed in a glass showcase for a museum. They are sometimes made by hobbyists.
This one is a miniature, but in a later season, Taylor creates a life-sized diorama.
The Annotated Gilmore Girls 