Miniature Ecosystem

http://reclaimgrowsustain.com/content/40-year-old-self-sustaining-ecosystem-jar

http://www.ehow.com/how_5552274_create-mini-ecosystem.html

http://www.bottlebiology.org/investigations/decomp_main.html

http://cranberrycorner.blogspot.fi/2010/07/summer-fun-ecosystem-edition.html

http://www.pinterest.com/ntxscied/mini-ecosystems/