Cool idea ZBCC!
Use a "pen" camera that can take close-up video/snapshots from 'within' the diorama/construct so it looks like you are standing in it. ...Like they do in the BRICK BIBLE online. http://thebrickbible.com/ (This type of camera is not expensive and can take 'macro' photos really easy).
The camera can be connected to a monitor/computer as well, allowing students to "see" from the point of view of the characters --which creates a fun and memorable visual. For example: In the Prodigal Son story, as you discuss the story's finer points, you can "illustrate" those points by having a student point the camera at the father's face and scan the horizon for the return of his son or show the older son's face close up. It adds a memorable wow factor, fun, and more hands-on, especially for older kids.
Update: Luanne Payne's "Story Table" posts below describe incorporating snapshots and video into the Story Table concept.