After seeing everyones really cool habitats. I decided to try my hand at making my own. Again thank you all for your great ideas and knowledge. It is constructed out of 2" Styro foam. I used a wire brush to do the major shaping. Then used a dremel to get the exact shape I wanted. Sanded it all smooth and coated it with Sand stone colored grout. once that was dry I added accent paint and sealer.