You can take a quiz game at :

http://www.neok12.com/Solar-System.htm

instruction must be following :
1). click the quiz games .
2). First click a yellow question Card, and then a blue answer Card.

Do you want to more understanduing solar system (including animation video)?
or  sufing : http://www.kidsastronomy.com/solar_system.htm

UNIT 6 : Investigating the Earth and the Universe

Lesson 1 Our Solar System

     

Lesson 2 How Far and How Big

Lesson 3 Planet, Planet How Are You ?