Websites are current as of August 6, 2012

Astronomy for Kids Online

Astroventure (Interactive)

Build a Solar System (Interactive)

The Nine Eight Planets Just for Kids

Extreme Environments

Interactive Mars Habitat

Interactive Solar System

JPL Solar System Simulator (Interactive)

Kids Konnect -- Planets

NASA Kid's Club

Planetary Body Names and Discoverer

Planetary Puzzles

Planets, Planets Information, Facts, New, Photos -- National Geographic

ScienceMonster -- Our Solar System

Solar Folklore

Solarpedia (takes time to load, but worth the wait!)

The Solar Symphony Game

The Solar System

Solar System -- Hot Spots for Life

Solar System -- Interactive Solar System

Solar System Simulator

Solar System Simulator

Solar System Trading Cards (Interactive)

Solar System Visualizer

StarChild: The Solar System

Sungazer

Windows to the Universe - Our Solar System