Moho actually sounds like a good choice to me. You can rig a character and just pose them. Once the rigging of the character is done can produce still frames much faster than painting each one I am sure.
The story for those who don't speak french : scientists create new animals and they bring them on an island to study them... Sometimes they bring objects too to test their reactions...
@red hamster :
I like the render effect of Moho... it's exactly what I search for my projects.
And the work with removable vectors is perfect for me.
@bupaje :
You're right with the bones and rig... even if I didn't use them here !