Fibonacci Hex
After a great mathart lesson from Paula Beardell Krieg, some subset of she, Sally Biskupic, David Butler and Dan Anderson started thinking about Fibonacci length hexagons. There are some here to start with, and the tool HexABC can make more. (Probably better to download if you want a lot.) Use the tool to make a point, then enter 3 numbers for the side lengths. Or you can type HexABC[ pointname, i, j, k] to make a hexagon on pointname with lengths i, j and k.
Paula's lesson, which includes printables.