Independent activity: Visit http://www.ecokids.ca/pub/eco_info/topics/frogs/chain_reaction/play_chainreaction.cfm (This is an energy chain!)
http://www.sheppardsoftware.com/content/animals/kidscorner/games/foodchaingame.htm.
Independent activity: Sort out food chains in various habitats at http://www.rspb.org.uk/youth/play/foodchainchallenge.aspx.
Independent activity: Try the quiz at http://www.bbc.co.uk/bitesize/quiz/q14979838 or http://www.zephyrus.co.uk/foodpuzzlechaina.html.
Independent activity: Build Deadly 60 food chains at http://www.bbc.co.uk/bitesize/ks2/science/living_things/food_chains/play/.
Independent activity: Work through the online activities about food chains/webs at http://resources.hwb.wales.gov.uk/VTC/16022007/food_webs/lesson.html
& then http://resources.hwb.wales.gov.uk/VTC/2009-10/science/cripsat/e14-interdependence/index.html.