Black Bears of NC, Rainbow Shelter, and more. Shan knows that the primary colors in pigments are red, blue, and yellow and in light they are red, blue, and green. Mr. Wizard does a demonstration with light. In this episode, Mr. Wizard shows Colored Shadows, Corn Starch Slap, Rainbow Shelter, Periodic Motions, Paper Flower Opens, Breathing Measurements, Coin on Hoops into Bottles, Black Bears of NC, and Sun Water Purifier.