interesting project need TINY & cheap seeds

I'm working on this art project where we need to arrange seeds into different patterns and then film the seeds sprouting / creating a pattern / drawing. This will really work with a lot of different kinds of seeds but the tricky part is I need to keep the detail really fine even when the whole layout is going to be massive. Hence after trying a bunch of seeds I've found Irish Moss to work nicely, it has tiny little seeds that produce tiny little sprouts (hence great pattern detail). Only problem is buying Irish Moss seeds gets pricey really quickly... So basically I want cheap TINY (like sand grain sized) seeds that will grow like this - http://files.getdropbox.com/u/455762/ex_irish_moss.jpg

Any help would be AWESOME!

Thank you in advance!

Fascinating assignment!

A couple of ideas:

Some other miniature plant ideas http://www.greenart.com/plants-miniatures.html

And a quantity source (5000-10000) for Irish Moss seeds: http://www.outsidepride.com/catalog/Irish-moss-Groundcover-Seed-p-16966.html

Sounds like an interesting project! We will want to see some of your photos when it's finished.

Good luck. t.

you can get bulk grass seed. I buy winter rye seed for .60 a pound