It's a dragonfly by WowWee toys.
It seemed hard to control at first, but a 9-year-old got the hang of it within 24 hours and managed to dive-bomb her brother with band-aid necessary results
. The instructions don't mention giving it a slight shove to get it started, but you do need to and you can see people doing that in all the videos.
it's awesome outside. Apart from the tree issue.