So many of us carry a brown paper bag to school each day, with our peanut butter and jelly sandwich, some peeled carrots, pita chips, perhaps a couple of chocolate chip cookies. But did you ever consider that ordinary bag outside of the confines of lunch? Did you ever think about it as a structure? The tie has come. You can use a new bag or a used one as the base of a lunchbag home. Just add windows, doors and a roof and you have something. Because you can seal air inside, they have volume, and can be placed around a mat, into a cityscape.
Try it after you eat lunch.
Thanks to Jan at Snippety Gibbet for the idea.