Cardboard WiFi antenna

If making nonworking devices out of cardboard isn't good enough for you, Tritium has an easy project that actually could be of some use. An alternative to high-priced replacement WiFi antennas, it has developed the the Flatenna, a cardboard and metal parabolic antenna that ships flat in an envelope for
£10 (plus shipping). You pop the antenna out from its surrounding cardboard and fold it up yourself, origami style. It mounts on your access point and supposedly doubles or triples signal strength by focusing the signal scattered in all directions and zapping it at your computer. Just be careful you don't mis-aim and boost your neighbor's signal instead.