ok! so following along with the current trend in PS and using only REAL minerals, I did a BIT of research and I thought that Alluminum might be a good choice to put in the materials list under metals?... it's shiny, light and maleable. the perfect metal for kylros'... I couldn't find anything about how easily mined it is though? so... I donno? maybe that doesn't really matter??
I just left the wood section, as it's got alot in it already... but the stone/rock section... I thought we could also use sand stone?... I don't really know but I get the impression it's alot like lime stone? like and easy to work with. Oh! and if we're looking for like things... volcanic rock is filled with air!! and therfore very light! the only problem is it's pretty brittle and I don't think there will be any volcanos in PS... atleast not untill the stone labyrnth opens up!

and finally for other materials, I'm just recalling old ideas here... Fish bones/fish membranes, kelp/seaweed, the obvious mud...
oh and I think we should also add a "Decorative Materials" section to that list. some entries could be: Sea Shells, Flourescent(is this the right word?? I mean glow in the dark!...) plants (mainly fungus), Flourescent insects (the ol' fireflies in a glass jar routine, y'know?), different minerals (local gems of course... I was thinking maybe even flourescent minerals!! [hah so much flourescence!!]), and finally decorative magic!
ok, I'm done!
Edit: the wiki link on the first post isn't working either...