It does work. It is his voice. (thank god theres no song )
he says
"Judge me by my size do you?"
"Use the Force."
"Do, or do not. There is no try."
Well, since I wasn't sure about his size I had to ask... it WILL be presented as a scaled replica when it's finished. (sure would have been nice to find a full scale one though )
They also had a Darth Vader head-on-a-stocking that was about the same size as yoda... but obviously yoda won the toss