Tap on window.
"Ack!".
Tap on window, again.
"Ah! Ahh!".
No need to look at the clock... It's just after 2pm and the Creatures Of Habit are demanding afternoon tea... 
We know when you are sleeping
We know when you're awake
We know when we want feeding
So feed us for goodness sake!
Whistling key tags.
In the 90's they were a hot item.
Attach them to your keys, and if you misplaced your keys, all you had to do was whistle and the tag would beep back at you.
The theory being that the beeping would lead you to the missing keys...
Brilliant idea.
Or so you might think...
A friend's mother, for reasons only known to her, bought half a dozen.
One went with the keys, the rest went in the dresser drawer in the loungeroom, it's a good place to keep the "spares".
Until she turned the vacuum cleaner on...
Can you say "Jumped out of her skin"?
I'm fairly sure they weren't the only thing that said "Beep!".
The toll for the toll for the till.
Once you started getting that one muddled they'd call Time.
