Web Sites
Sound
http://www.bbc.co.uk/bitesize/ks2/science/physical_processes/changing_sounds/play/
http://www.wonderville.ca/asset/how-we-hear
http://www.bbc.co.uk/bitesize/ks2/science/physical_processes/sound/play/
Light
http://www.sciencekids.co.nz/gamesactivities/lightshadows.html
http://www.bbc.co.uk/bitesize/ks2/science/physical_processes/how_we_see_things/play/popup.shtml
http://www.bbc.co.uk/bitesize/ks2/science/physical_processes/shadows/play/
http://www.bbc.co.uk/bitesize/ks2/science/physical_processes/changing_sounds/play/
http://www.wonderville.ca/asset/how-we-hear
http://www.bbc.co.uk/bitesize/ks2/science/physical_processes/sound/play/
Light
http://www.sciencekids.co.nz/gamesactivities/lightshadows.html
http://www.bbc.co.uk/bitesize/ks2/science/physical_processes/how_we_see_things/play/popup.shtml
http://www.bbc.co.uk/bitesize/ks2/science/physical_processes/shadows/play/