This looks like a cool little thing to make if you ever need to cut up some foam. As is so often the case, I saw this video on some POS freebooting Facebook page first, but this appears to be the original. “Do all appropriate safety things” (how’s that for a disclaimer?)
How to Make a Foam Cutter with 1.5V Battery
Light + Building - Exhibitors & Products - Mouse-PS Ltd - Light
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