Your student will build a physical, touchable model of how the body fights infection using a bowl, colored pom-poms, and beads to represent germs, white blood cells, and antibodies in sequence. The sheet guides grades 4-7 homeschoolers through six numbered steps, from placing germs into the body container all the way to leaving blue antibodies behind to demonstrate immune memory. A model key with labeled illustrations anchors each component before the lab begins.

Making a model of the immune system response works well as a standalone immune system lesson or as the hands-on anchor of a longer human body unit study. Six labeled observation boxes ask your student to draw or describe what happened at each stage, and a conclusion prompt plus a Think More question about immune memory push the science beyond the activity itself. Completing the sheet demonstrates that your homeschooler can sequence an immune response and explain why memory cells matter.