How to make a germ theory of disease history day exhibit visually engaging?


Ex. I know someone doing the invention of the light bulb, and they made a big paper mache light bulb.
My partner thinks we should put a red cross in the background, but we never even address the red cross. Help please!

Do several experiments of growing bacteria (germs) in Petri dishes. They can be your visual exhibit of how easily germs spread.