The document provides instructions for a marshmallow challenge activity. It outlines the goal of building the tallest freestanding structure using only spaghetti sticks, string, tape and a marshmallow. The winning team will have the tallest structure measured from the table surface to the top of the marshmallow, which must be fully on top. Teams have 18 minutes and can use as much or as little of the provided materials, breaking or cutting them as needed. Structures cannot be suspended or supported at the end of the time limit.