Coliform Growth Demonstration
Have you seen the coliform growth demonstration? It uses coffee grounds to represent the bacteria. Increasing amounts of grounds are placed in 7 self-sealing plastic bags. Each bag represents 20 minutes of bacterial growth in cow colostrum at 39C (102F).
Directions for making both a small (1 quart bags) and a large (4 quart bags) demonstration kit can be found at this location Coliform Demo Instructions
I use it with both individuals and groups to get across the message about the rapid growth potential of coliform bacteria in warm colostrum.