I'm not sure I understand the title, does looming help you think or something? I don't really have much inherent interest in looming, but I would have a lot of interest in that
This is the hackernews I desire!
tl;dr This is a project page describing a small hand woven loom. Small, means a little wider than a palm and maybe half the length of a forearm (depending on which you buy). Basically, you will run a string between two circular combs along the length of the stand and weave a separate thread or yarn horizontally many times to make a piece of fabric. These seem to cost at least 100$.
Does this scale to dining placemat size?
There's something to this. A lot of ideas that feel fuzzy in your head get clearer the moment you have to physically arrange them. Not sure an app captures that but worth trying.