Reserve a large space, like part of a playground or cafeteria, for both building and storing between sessions. You'll need a lot of space for construction and collapse. Pictures help to record student efforts and make the deconstruction of their structures less dramatic. Use matte knives or scissors to take apart the structures. Students will have an entirely different experience of these phenomena due to the changes caused by the change of scale.
Materials seem more flimsy, joints seem less secure.
This is a good activity to do near the end of your structure and scale unit, and should be preceded by building on a smaller scale. As in the smaller scale building-out activities, students should be given the opportunity to talk about bridges and cantilever structures that they know. Building on this scale provides a perfect opportunity to discuss the students' different experiences of building activities at different scales. Working with these materials may be very different from other building that they have done. The students need an initial session where they can familiarize themselves with these materials, as building out is particularly difficult on this scale.