Chiba Institute of Technology’s Advanced Robotics Laboratory creates robots that range from the large:

Video (Hyperion 4) (Mirror):

To the very small:

Video (4.9cm, 8g) (Mirror):

And check out this Butterfly Robot:

Video (Butterfly Robot) (Mirror):

And here you can see the Butterfly Robot’s wing mechanism, actuated by a crank-like turning motion:

Video (Butterfly close-up) (Mirror):

CIT and its offshoot fuRo have also created humanoid robots such as Morph3.

[source: CIT Advanced Robotics @ YouTube] via [ロボットのいる生活 (JP)]