Something like that
http://i1.trekearth.com/photos/101290/dsc_3674_0.jpg
https://static.groupon.com.au/03/98/1374633919803.jpg
http://1.bp.blogspot.com/_TdjG3L9BD44/SWc8FBxjX2I/AAAAAAAAAgU/e5sIQdhpFK4/s400/Mosquito+Ultralight+Helicopter.jpg
http://www.innovator.mosquito.net.nz/mbbs2/images/yellowxe.gif
or that
http://images.gizmag.com/inline/hirobo-bit-manned-personal-micro-electric-helicopter-11.jpg