Science of Light 
Wonders of Vision 
Light and Dark - BBC  
Optics for Kids 
Exploratorium 
Physics Classroom
Physics of Light and Color
Illusions
How We See Things
Grade 4 Science - Light 
Light and Shadows
Light and Shadows Activities 
Light and Shadows Games
Vision Experiences
Optics Activities
Amazing Illusions
Light and Optics
Light & Shadows Quiz
Light & Shadows Games
Light/Shadows Sites