The cat came unfortunately to not completely assembled.
The lid was on, but the operator and the arm were only loosely in the cat.
Use a small Phillips screwdriver at hand I could put together:
1. Unscrew cover.
2. drive screw on the lid, the 4 screws were already tubes
3. Screw the lid back on the cat
4. Install arm
This, attach with something suitably tilted back and then forward these DRIVING.
This should work without noticeable effort, until the arm snaps.
Now to the positive:
After inserting the battery, she began with a slight nudge to wave and completely GERRÄUSCHFREI with me.