Explorables: Handmade Science

Hexaflexagons, Möbius Strips, Pinhole Projectors, and Far Out Corners

Saturday, April 18, 2015 • 11:00 a.m.–2:00 p.m.

Exploratorium, Pier 15, Central Gallery

Included with museum admission.

All Ages

Stretch your perception with intriguing illusions and surprising shapes. Make hexaflexagons, Möbius strips, pinhole projectors, and your own version of Far Out Corners, an Exploratorium exhibit created by artist Bob Miller (1935-2007) and inspired by the Necker cube, an illusion created by a two-dimensional drawing of cubes that can appear as either concave or convex.

Flex and fold these odd geometric objects to reveal hidden faces and images.

Möbius Strips
Can you imagine a sheet of paper with only one side? Explore the strange surface of a Möbius strip.

Pinhole Viewer
Pinhole cameras allow us to take detailed pictures without using a photographic lens. Construct a pinhole viewer to examine the world around you—including the sun.

Far Out Corners
Use simple lighting to fool your eyes into perceiving three-dimensional cubes from flat, three-sided shapes.


Use everyday materials to create models and other tools for exploring the world around us. Run by a highly skilled, dedicated team of volunteers, these drop-in workshops mix classic activities with open-ended investigations, encouraging participants to follow their hunches to aha moments of scientific insight.

All materials provided; take what you make.

Explorables has been offering science to go since 1990.