one question:
if they can makle elmo do this:
why grover needs sticks to move his hands
maybe its like that ventriloquo from the simpsons
edit:
so robotics is discarded, maybe green screen with a guy dressed on green moving elmo?
nope elmo shadow fits
when you are small think elmos real
you grow and thing elmo fake
but the caught is he is real, probably a product of the supressed secret forbidden magic
from a time i can see auras on people
and i see a very intense purple hallo on elmo here
crazily here theres no aura at all