Almost anything is interesting under a microscope. Besides what is listed above: hair, human and pet; dust; dryer lint; circuit boards form anything electronic; mold; flower petals; wood; the thin membrane of an onion is only one cell thick, a little food coloring may enhance it; you can buy sets of educational slides and kits of various slide dyes for more serious investigating. You can investigate the differences how inkjet printers, laser printers, ball point pens, crayons, pencils look on paper and compare them to paper money printing. Pretty soon you won’t get a chance to use the microscope yourself. But if it keeps them from the Xbox, it will be worth it.
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