Websites
The Planets
http://starchild.gsfc.nasa.gov/docs/StarChild/solar_system_level1/planets.html
http://www.enchantedlearning.com/subjects/astronomy/planets/
Mars
http://starchild.gsfc.nasa.gov/docs/StarChild/solar_system_level1/mars.html
http://www.frontiernet.net/~kidpower/mars.html
http://www.astronomytoday.com/astronomy/mars.html