I don't know most of their names, jacey. Finding out is something I need to do. Very happy for other GN-ers to educate me. Anyone who has a flickr account can comment, I think.
We don't eat any of them, jeni. Well, DH ate one of the boletes but then we saw the roe deer eating them (they come looking for them) so we leave them now.
The temari balls are each made of a rolled up woollen sock (though you can use other rags or polystyrene balls; the Japanese traditionally used a wee bag filled with rice husks), which are then wrapped with a thickish layer of knitting yarn, then a layer of sewing yarn. Then you divide the ball up into sections with a marker thread and use the marker threads to guide your stitches. I think of it as two-dimensional geometry on a sphere (!). It appeals to my kind of brain.