The marshalled mini-cab project was set up by merchants in and around Leicester Square along with local minicab firms, the police and the council.

BBC: Holiday revellers given help home

As the accompanying mini-documentary shows, the team behind this project not only put great care into constructing the 20ft x 7ft custom track with the right bends, it also faithfully crafted the slot cars so as to mimic the Audi quattro's all wheel drive mechanic.

ENGADGET

This feeling of ownership has also been the reason for the project's success in Nepal - although there mini-grids are employed to supply power to remote communities.

BBC: NEWS | South Asia | 'Minigrids' solve South Asia power crisis

The blogger and author of The Frugalista Files: How One Woman Got Out of Debt Without Giving Up The Fabulous Life is marking her fifth annual No-Buy Month, a project which has garnered her national media attention and spawned a mini movement among her readers and social media followers.

FORBES: How To Have A Frugal (And Fabulous) February

But the project's first concept is most decidedly a four-wheeler: a plug-in electric Mini powered by a lithium-ion battery.

FORBES: Magazine Article