Single sheet Icosahedron (Patreon)

Folded from half of a square. Based on Shuzo Fujimoto's icosahedron, but I've found a way to keep it locked without tape/glue. He didn't mind using tape and this is the third time I'm "fixing" one of his models. I think this time I'll credit myself as co-author, it's a very simple change but very relevant