What part/actuator do you think they used

actuatorcomponentsmotor

At around 2:20 in this video there is an interesting use of electronics. You can watch the video but in short there are these little spoon creatures that pop out from behind a covering. The speed at which they react is proportional to sound. My question is what kind of actuator do you think they used for the movement? Sorry if this is a dumb question, I am not mechanically inclined.

http://www.youtube.com/watch?v=FQdQhV1yjfc

Best Answer

I'm not sure I can see ordinary RC servos there. It looks like the motors are those grey metal cylindrical things with the orange and green stickers.

Pygmies

Something like this maybe?

Stepper motor

It's a stepper motor.