A prickly structure made of 70,000 reusable hexapod particles: https://www.thisiscolossal.com/2018/10/a-prickly-structure-made-of-70000-reusable-hexapod-particles/
Sort of like those seawalls they build by jumbling together giant concrete caltrops, only with pieces that are not quite so big and with usable spaces left void within it. Sometimes the article says "hexapod" and sometimes "decapod"; the pictures appear to show structures that mix two different kinds of particle.
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