I'd like to thank Josie, as reading her work has inspired this first ever attempt at something for children.
This is exactly as typed as it came into my head, with no reworking. (Sorry if it shows!). 
Tess.
It is the hour after midnight
And all children are asleep.
When something stirs under the moonlight
And beady eyes begin to peep.
You'll hear the sound of whispers
And the pattering of paws.
Even muffled giggles
Or the squeaking of a door.
If ever you hear these sounds
Never even open your eyes.
For the magic spell will be broken
And you'll spoil the lovely surprise.
For if you should awaken
The magic will end very quick.
For it is only when we are sleeping
That teddy bears get up to their tricks.
