PKG(3) Pop-Up 3x Cardboard Binoculars. Great for Kids Parties! Cardboard Binoculars Cardboard binoculars are for observing paper lions. (Mahogany binoculars are for watching wooden performances, but we don&#39;t sell those.) These binoculars fold very nearly flat to 3" x 4" and magnify 3X through acrylic lenses. Flex them when they&#39;re unfolded and the focus adjusts somewhat. They&#39;re really made and priced for kids, are much better than they have any right to be, and can even be taken apart and used in a science fair telescope! Bonus: We&#39;d keep some in the briefcase and glove box, we would.