Did you find both halfs?
Once he's in the right shape. Click on his head to get the key. The key gets you a wierd device that needs the marble.
Now, I can't figure out why his body doesn't disappear like everything else that you have used up. Perhaps there is some other use for it. And the device (some sort of box with symbols on it) has totally stumped me.
Ack! only 30 more minutes to get this!