Bob the Builder...

I am totally captured by my new field of interest, I will try to build something like this myself:



here's an introduction to the subject:
»»» http://www.mikrokopter.de/ucwiki/en/Mikrokopter-Get-started



building something like this should cost around € 450 to 1000... relatively expensive, but I'll try anyway

you might even install a camera on board of the small flying object... or a guinea pig...
up to 250 g are no problem