This video ties into class the other day when we were learning about autostereograms.  This video goes in depth on the history of these images and also explains how it works.  I also thought it was interesting how the video brought up virtual reality because that is something new that we have recently talked about in another class of mine.

https://convertimage.net/online-photo-effects/create-anaglyph-stereoscopic-3d-images-online.asp

This website allows you to take any of your personal pictures and make them appear 3D using the red/blue technique we learned in class.

http://www.worqx.com/color/color_systems.htm

This website helps to explain the difference between additive and subtractive color mixing.  It also has good diagrams demonstrating both these color systems (RGB and CYMK).

This video explains what makes a rainbow.  It also has a demonstration using a prism similar to the one we had in class.  This video is aimed toward children to help them better understand what they are seeing.