This photo was taken about a month ago when I was visiting Toby Bailey and looking for ideas of a game I could make involving snarks. A snark is a 3-valent graph in which the edges cannot be coloured in 3 colours so as never to have two edges of the same colour meeting at a vertex. We tried out lots of ideas, including variations of the game of sprouts and 2-player games where people had to alternately colour the edges of a graph. The final game became part of an activity at the National Museum of Scotland in Edinburgh, which was a Lewis Carroll themed night at the museum. Read more about the event, snarks, and other Lewis Carroll maths on my other blog.