Builders pour concrete into temporary wooden molds. MIT researchers invented a way to make them out of on-site soil instead.

i think that there is something kind of cool about kinetic sand i was curious how it would work as a mold making material. to my surprise it worked really well as a reusable mold for both molten metal ...

We can see that maybe readers have only so much space in their lives for concrete owls, but this process could be a valuable part of the armoury when it comes to making some less decorative items.