This is an activity I used when teaching the parts of the monogastric digestive system. I found it online and it was for human anatomy, so I modified it slightly for livestock. The students look at the digestive system as a vacation with each organ as a destination. They created brochures with creative explanations, for example I had one group explain the large intestine as a water slide. I used it as an assessment to the lesson, but I think it would work well as an intro to the lesson as well.