shadows


 * http://www.bbc.co.uk/schools/ks2bitesize/science/revision_bites/see_things.shtml || How we see things ||
 * http://www.bbc.co.uk/schools/ks2bitesize/science/revision_bites/light_dark1.shtml || Sources of light ||
 * http://www.bbc.co.uk/schools/ks2bitesize/science/revision_bites/light_dark2.shtml || Seeing objects ||
 * http://www.bbc.co.uk/schools/ks2bitesize/science/revision_bites/light_shadows1.shtml || Light and shadows 1 ||
 * http://www.bbc.co.uk/schools/ks2bitesize/science/revision_bites/light_shadows2.shtml || Light and shadows 2 ||
 * [] || Light and shadows 3 5 ||
 * http://www.bbc.co.uk/schools/scienceclips/ages/5_6/light_dark.shtml || BBC Interactive Games Light and Dark ||
 * http://www.bbc.co.uk/schools/scienceclips/ages/7_8/light_shadows.shtml || Light and Shadows ||
 * http://www.bbc.co.uk/schools/ks2bitesize/science/activities/see_things.shtml || How we see things ||