Here are some suggested websites that have information about the Moon and other astronomical subjects:

http://heasarc.gsfc.nasa.gov/docs/StarChild/StarChild.html

http://liftoff.msfc.nasa.gov/kids/

http://www.tcsn.net/afiner/intro.htm

http://www.tcsn.net/afiner/moon.htm

http://science.coe.uwf.edu/SH/curr/moon/moon.htm

http://www.ac.wwu.edu/~skywise/legends/html#Moon

The Moon
by Karen Gunderson

The light from the Moon really comes from the Sun
Watching its phases can be lots of fun.

We can’t see a new Moon, because there’s no light.
But then a thin crescent shows up in the night.

Next, quarter moon, half moon, and then very soon.
The sky is lit up by a big bright full Moon.

As the phases continue the light moves on.
Until once again it looks like it’s gone.