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MAKE A RAINBOW - Heather comes upon Mr. Wizard sprinkling the lawn. He asks her to describe a rainbow. He notes that a rainbow is formed when there are tiny drops of moisture in the air and you look at them with the sun behind you. Each person sees an individual rainbow. HARD BOILED vs FRESH EGG - Which of two eggs is hard boiled and which one is fresh? Jason spins each egg on a plate. One spins easily and the other does not. Which is which? WHAT IS THIS? - : Transparent knobs along the edge of woven fibers indicate this is something man-made. A clue: another row of knobs is brought from above and pressed into this row. The knobs interlock. MOTHBALL FROST - Leila and Mr.Wizard examine mothballl crystals on a plate. They point out the shiny surfaces that indicate that the mothballs are made up of crystals. Mr.Wizard melted mothballs and made the crystals by condensing the vapor. The mothballs were put in the bottom of a glass mixing bowl with a shallow bowl on top. The bowls were heated on a double boiler. After the vapors cooled, crystals formed on the underside of the bowl. RANDOM COMPUTER NUMBERS - Tanis tries to define the word random. She says it means numbers in any order or any place. Mr.Wizard asks for an example and has her write down the numbers from 0 to 9 in random order. Tanis writes 2,7,1,5,4,9,0,1,3. Mr. Wizard says they are not random because a person can never choose numbers completely randomly because we usually develop some kind of pattern for choosing. WILDLIFE CENTER - If you want to become a biologist who specializes in working with animals, here’s the kind of project you might work on. You’d place nesting boxes in meadows to attract wild starlings. When the starlings move in, you’d capture some of them. You’d feed them carefully measured doses of chemicals used by farmers to control insects. NUTTY SURPRISE REACTION- Mr.Wizard offers Stacey peanut brittle in a can. She opens the can and spring snakes pop out and fly across the room. They discuss Newton's Law that states for every action there is an equal and opposite reaction. WEIGHTLESS CLOTHESPINS - Mr.Wizard asks Eugene his weight. Eugene knows that when he steps on a scale, it's the force of gravity that is being measured. Mr.Wizard explains the difference between gravity AND free fall by using suspended clothespins as an example. PLASTIC WATER BOTTLE FOUNTAIN - Mr.Wizard inverts a bottle of water over a plastic cup with two holes, one above the other. Water pours out of the bottom hole. Tanis stops it by placing her finger over the spout. When she removes her finger, bubbles rise in the inverted bottle. Every time water comes out, air goes into the bottle in the form of bubbles. When she covers the upper hole, she explains no water can come out because no air can get in. ROTTEN APPLE MOUNTAINS - This illustrates one theory of how some of the Earth's mountains were formed. Once this was a smooth surface, but the material below shrank just as the molten inner part of the Earth did as it cooled. The outer skin buckled and folded forming the mountains on the surface of a decaying apple. BICYCLE’s 3 WHEELS - Mr.Wizard tells Leila that her bicycle has six wheels of three different kinds.