Thank you Lord Ned and Scar~face.
Here is a pic with the ears closed:
I need to add a kind of bumpers inside the ears, so they close flush with the sphere. Right now they fall into the sphere about 3mm.
Last night I added the hinge that connects upper and lower hemisphere and two guidances so the mouth can't move right or left.
Working time: 1,0h. Total: 9,0h