Use the following links to explore ecosystems further. There are a lot of interactive activities.
Chain Reaction-Build a food chain and see what happens when something gets taken out. http://www.ecokidsonline.com/pub/eco_info/topics/frogs/chain_reaction/index.cfm#
Food chains and Food webs-Create your own food web, see other food webs, and see and visit other links through this site. http://www.vtaide.com/png/foodchains.htm
Interactive crossword puzzles for ecosystem vocabulary http://www.vtaide.com/png/foodchains-puzzle.htm
Animal Adaptations-See if you can identify an animals adaptations before the time runs out! http://www.ecokidsonline.com/pub/eco_info/topics/climate/adaptations/index.cfm