div class=ts-pagebuttonPage 1button div class=ts-image amp-img class=ts-thumb alt=Page 1: Exploratorium: The Museum of Science Art and Human Periscope with a Twist Turn the top mirror on a periscope and watch the world go around Personal Pinhole Theater A pinhole camera src=https:reader034vdocumentsusreader034viewer20220429175f5b6268bc07da60c26f2b5chtml5thumbnails1jpg width=142 height=106 layout=responsive amp-img divdiv