The Guardian asked its readers to share their pictures of what cyclists have to put up with. Here are 20 highlights lowlights.

• More photos on The Guardian

Create your own pirate TED Talk with the installation "Ideas Worth Spreading" by Evan Roth.

The installation mimics a TED stage complete with props, headset, camera, projection, spotlight etc.

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If in New York you can try it out for yourself at F.A.T. Lab’s FAT GOLD exhibition at Eyebeam. The exhibition is on view until April 20 (so hurry up!).

• Ideas Worth Spreading

Photo project by the Italian photographer Ra di Martino who discovered the architectural remains of the Star Wars movie set on Google Maps.

It turns out that Luke Skywalker's childhood home is not located on planet Tatooine, but in the Tunisian dessert at the coordinates 33°59’39 N 7°50’34 E.

More about the photo project on The Guardian.

• www.radimartino.com

Graffiti spotted in The Simpsons.

• Via urbanshit

What would Google+, Youtube, Facebook and Pinterest look like if they were created in 1997?

Once Upon is a web project by the media artists Olia Lialina and Dragan Espenschied, who re-created four contemporary websites with the technology and spirit of the late 1997's.

Netscape Navigator, frames and modems may not resonate much with digital natives, but to the generation before them Once Upon is a sweet reminder of early day web-aesthetics.

The sites Google+, Facebook, Youtube and Pinterest are best experienced using Netscape Navigator 4.03 and a screen resolution of 1024×768 pixels, running Windows 95.

• Once Upon

Just before Christmas POKE London came up with a snow-cannon installation that allowed people to trigger a snowfall using their smartphones.

Posters in Rivington Street in Hackney encouraged pedestrians to make a call or check in using Foursquare. Those curious enough were rewarded with a snowfall to the tunes of ‘Let it Snow’ by Dean Martin.

• Making Hackney Sparkle

A piece of urban furniture and landmark created by pupils at the elementary school Tove Ditlevsens Skole (TDS) in Copenhagen.

The sculptural object is one of many elements conceived to revitalize the public space around the school and in Copenhagen's Vesterbro district in general.

The idea behind the object is developed by the pupils themselves after a week of workshops and prototyping facilitated by the urban network Supertanker.

• More info on Facebook (in Danish)

A flashmob is planned on the last day of 2012 in Berlin in honor of the experimental composer John Cage.

The flashmob will stage John Cage's famous composition 4'33" - aka four minutes and thirty-three seconds of silence.

The piece was composed in 1952 for any instrument and the score instructs the performer not to play the instrument during the entire duration of the piece.

Everybody can participate in the collective performance of 4'33". Only requirements are to bring an instrument and NOT to play it during the performance.

Meeting point: Alexanderplatz, Berlin
Date and time: December 30th 2012 at 15:00 / 3pm

"Everything we do is music" - John Cage

• More info on Facebook and here

Sticker-hack on a bike traffic-light in Copenhagen.

ZYX is an iPhone app that turns the user into a performer.

The app instructs users to do slightly bizarre things with their iPhone, like jumping with it, pushing it, turning it and shaking it.

ZYX is created by the legendary art-duo and interface-experimentalists JODI. When they first submitted ZYX to the App Store it was rejected, because the user-interface was not of "sufficient quality", according to Apple's standards.

Quote:
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Please evaluate whether you can make the necessary revisions to improve the user
experience of your app.
---

• ZYX on iTunes App Store

Spanish street-artist Spidertag went to the Swiss Alps armed with a hammer, scissors, nails and lots of yarn.

The trip was captured on video and in images by photographer Thomas Stöckli.

Previous work in Madrid

• Spidertag on flickr

Between 1988 and 1991, Comme des Garçons explored the sixth sense through photography, illustration and artworks in a magazine called Six.

Now, they've created a small poetic iPad app that allow users to swipe, tilt and scroll through six audiovisual chapters based on selected images from the magazine.

Moving Six feels slightly like early-days explorative CD-rom art, when digital experiences was not all about functionality and usability. The app is designed by Comme des Garçons founder Rei Kawakubo in collaboration with digital agency Meri Media who has previously created apps for fashion heavyweights Gucci, Stella McCartney and Vogue Homme.

• Moving Six on iTunes App Store

A very long grass carpet running through the village of Juajac in France.

The carpet was created by artist Gaelle Villedary to celebrate the 10th anniversary of the program “Arts and Nature Trail”.

The green trail required 168 rolls and runs for 420 meters (1,377 feet). Total weight: 3,5 tons.

Other long art-installations:
Water road + The knitted mile + Kitchain

• Gaelle Villedary Via Rebelart

Activists in the French-Basque region creates a large-scale piece of green graffiti on the hillside of the mountain La Rhune.

The Basque words EZAHT LGV NON (no to the LGV) are written in protest against the construction of a new LGV high speed railway line that will go across the side of the mountain.

Apparently the construction of the LGV line will go ahead and the words on the hillside are gradually erased as the vegetation grows back.

Related: • Hello Mr. President

A first-aid kit for the home designed to improve user-friendliness in stressful situations.

So colorful and cute-looking that parents will probably need to hide it from their kids.

Color coding and hierarchical logic provides an easy content overview. The red compartment contains first-aid for bleeding, yellow is for burns, blue for sprains and green for cuts and scratches. Hopefully the design has been tested for color blindness.

Video-intro in Danish (just ignore the soundtrack).

The kit is designed by Designit for Falck Healthcare.

• www.designit.com