A Virtual Journey Into the Universe: Good for all planets and the sun
http://www.thinkquest.org/library/lib/site_sum_outside.html?tname=28327&url=28327/main/cockpit.html

Amazing Space: Go to Comets or Solar System Playing Cards
http://amazing-space.stsci.edu/resources/explorations/

Asteroid Page: For Asteroids
http://www.stargazers.freeserve.co.uk/asteroidpage.htm

Kids Astronomy.Com: Go to Solar System
http://www.kidsastronomy.com/

Astronomy for Kids: Good for planets and sun
http://www.astronomy.com/content/static/AstroForKids/default.asp

A Field Guide to the Universe: Planets, sun, and asteroids
http://www.astronomy.com/content/static/AstroForKids/default.asp

The Moon
http://www.stargazers.freeserve.co.uk/Moonpage.htm

Astronomy Links: Start here, go to all kinds of sites
http://dmoz.org/Kids_and_Teens/School_Time/Science/Astronomy_and_Space/Solar_System/

The Sun
http://www.stargazers.freeserve.co.uk/Sunpage.htm

The Solar System: Something for everyone!
http://www.stargazers.freeserve.co.uk/Sunpage.htm

A-Z's Home schooling Astronomy: All topics here
http://www.gomilpitas.com/homeschooling/explore/solarsystem.htm

Yahooligan search results for "Solar System" many links
http://www.yahooligans.com/Science_and_Nature/Astronomy_and_Space/Solar_System/

Sites that do not relate to the Solar System Poster and Presentation Project
(for later reference)

Amazing Space
http://amazing-space.stsci.edu/

NASA's Observatorium: Fun and Games
http://observe.arc.nasa.gov/nasa/fun/fun_index.shtml.html

Bad Astronomy.Com
http://observe.arc.nasa.gov/nasa/fun/fun_index.shtml.html

The Space Place
http://spaceplace.jpl.nasa.gov/