A little help please..:)

[Rebostar]

Hey guys...
I have come across from another forum, a costume builders group, to ask for a little help.

A few of us there are building Ironman suits, they are all still in the early stages, but we are trying to trouble shoot a few future problem we are going to experience.

The one that has brought me here is the helmet mechanism which we believe is servo controlled.
None of us there have a clue as to what we exactly need to achieve the result shown in the attached video, could someone here advise us on the best approach?.
The solution would need to be fairly inexpensive due to having a few teenage builders on pocket money budgets.
The mechanism, we should be able to figure out between ourselves. We just need to know what servo (slim profile as space is tight), servo controller and switch to use and how to set them up to achieve this senario. Press button, mask opens, press button again mask closes, simple?.

http://www.youtube.com/watch?v=rOF7nqrNt2I

We appreciate any help and suggestions you can offer.

To staff... Sorry if this topic is not allowed, but we have all searched for the best site to ask for help at and I picked this one due to what looks like indepth knowledge on all thing robotic.