http://www.channel4learning.com/apps26/learning/microsites/E/essentials/science/material/interface?type=image¶meter=Characteristics+of+materials
http://www.bbc.co.uk/schools/scienceclips/ages/6_7/grouping_materials_fs.shtml
http://pbskids.org/rogers/R_house/buildNeighborConstruction.html
http://wsgfl2.westsussex.gov.uk/aplaws/intergames/science/v5_CyrilsCheese2.swf
http://www.crickweb.co.uk/ks1science.html#materials2d
http://www.edheads.org/activities/simple-machines/frame_loader.htm
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