For the Mudcat kids page:
Here is a song for kids to memorize the names of the planets. I found it in a home school newsletter. There was no author attributed.

THE PLANETS REVOLVE AROUND THE SUN
(sung to When Johnny come Marching Home Again)

The planets revolve around the sun, Hooray! Hooray!
The planets revolve around the sun, Hooray! Hooray!
The planets revolve around the sun,
And spin on their axis, every one,
And they all go spinning, around and around they go.

Mercury, Venus, Earth and Mars, Hooray! Hooray!
Mercury, Venus, Earth and Mars, Hooray! Hooray!
Mercury, Venus, Earth and Mars,
All whirling and twirling among the stars,
And they all go spinning, around and around they go!

Saturn and Jupiter are next in line, Hooray! Hooray!
Saturn and Jupiter are next in line, Hooray! Hooray!
Saturn and Jupiter are next in line,
Uranus, Neptune, and Pluto make nine,
And they all go spinning, around and around they go!

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a joke from the same newsletter:
Email from outer space
SCIENTISTS DECODE the First Message From An Alien Civilization

Simply send 6 x 10 to the 50 atoms of Hydrogen to the Star System at the top of the list, cross off that Star System, then put your Star System at the bottom of the list and send it to 100 other Star Systems. Within one-tenth of a Galactic Rotation you will receive enough Hydrogen to power your civilization until entropy reaches its maximum! IT REALLY WORKS!