Castanet-Head

I used (before children) to covet those fancy alarm clocks which have a soothing light which gradually brightens as wake-up time approaches, and a gentle "gong" sound to wake you.

Now I have a hound dog who starts shaking his head--flapping his long, drapey ears so they wrap round and slap each other loudly--exactly half an hour before the children wake up and start screaming.