Good night, sleep tight

Good night, sleep tight,
Wake up bright
In the morning light
To do what's right
With all your might.

Variation: Line added between first and second "Don't Let the Bedbugs Bite"

Variation:

Good night, sleep tight,
Don’t let the bedbugs bite.
And if they do
Then take your shoe
A nd knock ‘em ‘til
They’re black and blue!