The ancient craft of making leaf skeletons is easy to love but difficult to master. This guide teaches you how to make them, plus a range of fun uses.

Cut out a stack of leaf shapes from the colored card (why not trace real leaves to make these ones). Use the gold pen to draw veins on your leaf cut outs. Glue one side of the leaf onto another and ...

You might assume that a leaf's vein patterns fork, like tree branches splitting into twigs as they get further from the trunk. But peer carefully and you'll see that the veins make innumerable ...

Nature is a great architect, and the vascular network - or veins - of a leaf are key to its structure. Mathematical physicists at Rockefeller University use fluorescent dye and time lapse ...