I can't understand the text, but the pictures look pretty neat. They are using styrofoam with some sort of glue or paint with sand. I think I've seen some people on these forums using a similar method, so if anyone can fill us in on what exactly is going on here, I'd love to read it. Or, if you can understand the text and want to summarize, that'd be great, too.
http://koti.welho.com/jkoski3/terraario/gekkotausta2.html
http://koti.welho.com/jkoski3/terraario/gekkotausta2.html