I've written before about what a sucker I am for fidget toys. The algorithm gods appear to have heard me, because I recently stumbled upon these absolutely insane, modular, fidgety takes on a balisong or butterfly knife. Instead of a swift instrument of death, however, these alternately cute and techy toys feature things like Lego mounts, Flipper Zero cases, a built-in flute, a 20-sided die display, mechanical keyboard clickers, Beyblade launchers, and more, all mountable on these reconfigurable fidgets that you can flip and twirl like an expert in Filipino knife craft. They are super weird, and I've already ordered several for myself and the kids to try out.