Logic Puzzles

• Puzzles.com
• Logic Puzzles gathered at Math Playground
• Conceptis logic puzzles

Bart Bonte's games (www.bontegames.com) - our favorite!

• Factory Balls  
• Factory Balls 2 
• Me and the Key 
• Duck 
• Fields of Logic

More physics games:

• PhysicsGames.net
• Civiballs at CoolMath-Games.com
• Engineering Games
• Magic Pen (or here)

Design Squad Nation at PBS Kids: Fidgets, String Thing

Chess:

• ChessKIDS Academy
• ChessKid.com 

Logic and Rhetoric:

• YourLogicalFallacyIs.com  
• Love is a Fallacy