A worker test drives a car in the shape of a heels on a road in the southern Indian city of Hyderabad March 7, 2012. The shoe is part of a ladies series of creations by Indian car designer Sudhakar Yadav to mark the International Women's Day and the car ca
(Foto:Reuters/Krishnendu Halder)

Didi Senft, a 56-year-old cycling fan better known as 'El Diablo', poses for the media before riding on his so-called 'guitar bicycle' in Storkow, some 50 km (31 miles) south of the German capital Berlin, April 8, 2008. Didi made the giant 'guitar bicycle'
(Foto:Reuters/Fabrizio Bensch)

Zhang Wuyi sits in his double-seater submarine during a test operation at an artificial pool near a shipyard in Wuhan, Hubei province May 7, 2012. Zhang, a 37-year-old local farmer, who is interested in scientific inventions, has made six miniature submari
(Foto:Reuters/Stringer )

Hungarian Istvan Puskas poses with his wooden chopper in Tiszaors, 161km (100 miles) east of Budapest, June 14, 2012. Puskas, a 52-year-old tractor driver, built his bike in two years from firewood.
(Foto:Reuters/Laszlo Balogh)

A woman and her son sit inside the capsule of an electric tricycle as they drive along a main road in central Beijing March 15, 2012.
(Foto:Reuters/David Gray)

Didi Senft, a bicycle designer better known as 'El Diablo' or the Tour de France devil, poses on his 'Klingelfisch' (Bell Fish) bicycle in Storkow some 50 km (31 miles) south of the German capital Berlin March 3, 2007. The cycle is designed by Senft and ma
(Foto:Reuters/Tobias Schwarz)

Artist Roongrojna Sangwongprisarn inflates air into the rear tyre of a motorcycle made from recycled materials of spare parts from cars and bicycles at a workshop in Bangkok July 27, 2011. Roongrojna, 54, creates his artworks from recycled spare parts from
(Foto:Reuters/Sukree Sukplang )

Sudhakar Yadav, an Indian rides a cricket bat shaped car in the southern Indian city of Hyderabad March 10, 2007. A 25 feet long cricket bat shaped car is to support team India in the world cup cricket, Yadav said.
(Foto:Reuters/Krishnendu Halder )

Artist Frank Boelter sits in his lifesize paper boat as he leaves a shipyard in Lauenburg August 23, 2007. The boat, made from a 170-square-metre piece of 'Tetrapack' paper normally used in milk packages, is part of his exhibition called 'Bis ans Ende der
(Foto:Reuters/Christian Charisius )

German bicycle designer Didi Senft presents his latest work in Storkow, some 50 km (31 miles) south of the German capital Berlin, April 26, 2011. Senft, who is also a cycling fan better known as 'El Diablo' from the Tour de France, built the vehicle from a
(Foto:Reuters/Tobias Schwarz )