More fun than it has any right to be.

I got a little Syma S107 micro helicopter, and it's all sorts of awesome.  It's gyro stabilized, so there's minimal learning, I've flown it like four times now, and I'm getting pretty good already.

The biggest downside is that, much like a real helicopter, the down time between flights is insanely higher than the actual time you get to fly.  About 40 minutes of charging to fly for about 5 minutes.