Use these sites to learn about Materials:

http://www.innovationslearning.co.uk/subjects/science/activities/materials.htm

http://www.bbc.co.uk/schools/digger/7_9entry/8.shtml

http://www.bbc.co.uk/schools/ks2bitesize/science/materials.shtml

http://www.crickweb.co.uk/assets/resources/flash.php?&file=changingstate

http://www.fossweb.com/modulesK-2/SolidsandLiquids/index.html

http://www.coxhoe.durham.sch.uk/Curriculum/Millionaire/scimill1.htm

http://www.e4s.org.uk/a_zone.htm