In my search for Abram and Sarai Godly Play ideas, I came upon these three great resources:

First, a YouTube video of the entire lesson.
Second, Judy Jower’s flickr photo of her set.  I love how she just gathers things that work together.
Third, the script for the lesson of The Great Family.

Hope you find these helpful.  I’m off to gather a desert, a piece of blue felt, rocks, and Abram and Sarai.