I just felt like building one of these.
It took about 2 hours to build.
and now for the main attraction: the wings flap up and down, and they still touch the corners.
It was a bit hard to build, since there isn't that much space inside. but I did manage to make the wings flap.
some of you might think: "I bet you couldn't make the head move."
As I said before there isn't that much space, and the mechanism for
the wings already takes up much of the empty space. plus when I first
built it, I didn't even think about it.
BUT WHAT DO YOU THINK ME FOR?
OF COURSE THE HEAD CAN MOVE
ON MY VERSION.
It was still hard to make the mechanism for the head, and since there wasn't space enough for a ball-joint the head can't tilt.