You can demonstrate the destructive force of volcanic mudflows to your early earth scientists using this lesson plan. Messy, but memorable, the two demonstrations require some preparation. Use one or both! Included is a link to activity sheets for predicting the path of a mudflow over the Mount St. Helens landscape. Unfortunately, the link to the map for Part A on the snowline worksheet is not working. Even without this particular worksheet, this is a very visual and valuable lesson.