well you can buy a chinese knock-off of the actuators the MIT people used from spark fun:
<a href="https:&#x2F;&#x2F;www.sparkfun.com&#x2F;products&#x2F;10976" rel="nofollow">https:&#x2F;&#x2F;www.sparkfun.com&#x2F;products&#x2F;10976</a>