Flexagon updated their cover photo. ... Flexagon, profile picture · Flexagon · Cover photos · Nov 6, 2020 ·. View Full Size · 2 people like this. Loading. ... <看更多>

Build a Hexaflexagon by thinkthings.org: Flexagons are polygons which change faces when they are flexed. Here is a pattern to print and fold! ... <看更多>