Building is really fun. Mixing cob can be done by dancing/stomping the materials + water on a tarp. Building is grabbing chunks of mixed claylike material, and stacking it on top of the walls being built and working it in with your hands or sticks. Building is also accessible to anyone of any shape, age, size, or ability since there are no standard sizes of materials you have to be able to lift and maneuver, and the worksite is safe and fun the whole time. At the end there is no waste/packaging material to haul away and the only impact on the surroundings was a hole that all the clay was dug out of, which could be filled in with any leftover sand.
I really like this take.