The board game Mensch ärgere Dich nicht (Don’t get annoyed, man) was extremely popular among German troops in the First World War, but a Don’t-get-annoyed ring is something quite unique. From the end of the sixteenth century they were exchanged among friends and lovers to test each others’ dexterity and patience. The ring consists of six parts which can be dismantled. The challenge is to put them back together as they should be. It seems this could be frustrating.