Cut
out a circle of white cardboard about 8 cm in diameter. Divide it into eight
equal sectors. Color them with the seven colors of the rainbow in order and
leave a blank. Goes a pointed stick through the center of the circle. Hold the
stick to the circle with cellophane tape or plasticize. Make it spin like a
spinning top or “pirindola” You can also do it by sticking the card stock on a cd and pasting a marble in the middle hole. This is called the Newton disk
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