My kids at the childcare centres I work at are singing;

one two three,
Mummy caught a flea,
Put it in the teapot to make a cup of tea,
Flea jumped out,
Mummy gave a shout,
In came daddy with his shirt hanging out.

We're off, we're off,
We're off in a motor car,
Fifty coppers are after us,
And they don't know where we are.

Twinkle twinkle Vegemite,
On a sandwich brown or white,
If you drop it on the ground,
It will turn your carpet brown,
Twinkle twinkle Vegemite,
I'm OK and you're alright.
( for Americans, Vegemite is a thick, brown, yeast-based goop children seem to enjoy on bread.)

And finally a set of words composed by Adie, a four year old, that's become a local classic.

Tyrannosaurus Rex is built like a tree,
When I saw him coming, I had to have a wee,
I was so scared I had to flee,
What would he do to me.

Use a downhill bass line like "16 tons" or "Hit the road,Jack" and sing the melody uphill and you have the tune. Key usually Em.

                              Your good health, folks,

                               Jack Halyard