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Students investigate the colors in leaves by rubbing them on a white piece of paper or cloth . Print them in an attractive large font and on a white piece of paper . Fold a white piece of paper into an airplane . Around 1900 , Irish-born American inventor John Holland , the so-called father of the modern submarine , experimented with a lens and mirror system called a camera lucida that was mounted in a long tube and projected an image of the above-water scene onto a white sheet of paper . One donation was received , wrapped in a single white piece of paper with just the words " Yeah , milk !