Papercraft Cars

Paper and papercraft are incredibly expressive and relatively easy, and in the hands of such masters as these... really impressive.

Designer Taras Lesko's build of a Pagani Zonda supercar. (the video includes loud music... so... be forewarned.)

German papercrafter Dimi created a full-sized Ford Mustang front end in his living room, using corrugated cardboard. (more awful music.)

This one though, a full-sized, complete on the inside and out one, from artist Jonathan Brand.

via Core77

SmartInversion: helium-filled flying object that moves through the air by turning inside-out

From the Festo web site:

SmartInversion is a helium-filled flying object that moves through the air by turning inside-out. This constant, rhythmically pulsating movement is known as inversion and gives the flight model its name. With the intelligent combination of extreme lightweight construction, electric drive units and control and regulation technology, inversion kinematics can be indefinitely maintained to produce motion through the air.

5 - Paper Metropolis

Kiel Johnson and his trademark uses of  cardboard as material to erect very detailed cities, masks and objects has allowed him to travel the world under the giant creative wing of TED, the now international idea spreading speaking and activity series. 

via LA, I'm Yours

5 - Moving Lego Replica of Rolls Royce Jet Engine

While it doesn't work (as a jet engine) it is an impressive feat of lego magic.  

via One Cool Thing A Day