Here is the full list of all 8 Kinect Fun Labs: Mutation Station achievements worth 50 gamerscore.
Bent your body as much as you could in two directions
Activated the second transformation beam
Discovered each of the different transformation effects in one play session
Fully inflated and fully deflated your head
Shared three times in one play session
Shared a photo on KinectShare.com
Shared a video on KinectShare.com
Experienced your first complete transformation