What inspired me to host a homeschool co-op about germs and the lymphatic system was to motivate the kids to wash their hands! Even though we homeschool, it seems at the beginning of the school year everyone gets sick all the time. After doing this activity the kids were washing their hands over and over for fun! I kid you not. We did this homeschool co-op about germs and the lymphatic system with first graders, but it would be appropriate for ages 4-8.  Human Anatomy Puzzle First, we had the kids put a human body anatomy puzzle together. This human …