PaperFun
Flexagons
Flexagons
Paper folding where a figure has multiple faces besides the original two.
Want to make one of your own?
Intrigued? See part 2 of the above Vi Hart video, as well as her Hexaflexagon Safety Guide.
See the Wikipedia Flexagon page, which includes links to:
4-sided Tetraflexagon [video] from a single piece of paper
Robin-Moseley's flexagon.net site, which has templates including the Trihexaflexagon
WindSurfer WiFi Antenna
WindSurfer WiFi Antenna
Double your signal strength at your wireless router antenna using the WindSurfer found at, a cheap paper-and-tin-foil parabolic antenna. The site (http://www.freeantennas.com) has other designs as well.