Here's my fidget cube that I made for my niece. She wanted one of these as her old one broke, but every time I printed one, my print would fail. So I took it upon myself to design one of my own. It should be sturdy enough as I've tested it by pulling on it. If it breaks, it is more likely to come apart at the layers than it is to break at the hinges. I hope you like my design even though it is very simple :)

(Made from the bottom up in Blender and printed on the Bambu Labs P1S Combo printer.