Science: Who were the Wright Brothers and what was their first glider like?

This NASA video describes how the Wright Brothers used the scientific inquiry in learning to fly.  It will demonstrate how their first plane worked.  It discusses pitch, yaw, and roll.

Subject:  Physical Science
Grade Level:  6-12
Length:  4:18

Science: What is light?

I think I remember seeing this video when I was a kid, but don't worry.  It discusses what light is and how we actually only see objects that either emit or reflect light.  Even though it looks to be an older video the science is sound.  

Subject:  Physical Science

Grade Levels:  K-4