What are some ideas for a western expansion museum exhibit?

I need to make a museum exhibit from the western expansion for my American history class. We need to make artifacts. People in my group already made

1. A model covered wagon
2. Medicine
3. Models of the people
4. The terrain
5. Supply list
6. Pan
7. Map
8. Fake gold bar

It cant be something too big like a pickaxe. We can’t go into the industrial revolution. Keep it to the oregon, santa fe, mormon trail and gold rush.

Exhibits like this often overlook the effect on Native Americans. Perhaps a map showing all of the tribes that were forcibly relocated. Or if you want something more visual, there are some wonderful old paintings of the Cherokee Trail of Tears, when the tribe was forced out of their homeland and had to walk all the way to Oklahoma.