Here are some websites/info that can help you find out more about Castles.
Design a coat of arms
http://www.educationscotland.gov.uk/scotlandshistory/medievallife/castlelife/index.asp – life in a Scottish Castle and links to Kings and Queens, Knights and tournaments.
http://www.kidsonthenet.org.uk/castle/view.html – explore a castle online
http://www.childrensmuseum.org/castles/games.php -lego Castle adventure
http://www.english-heritage.org.uk/about/multimedia-library/how-to/ – how to knock down a castle wall!
Here are some famous castle in Scotland and where they are in Scotland. How many more castles can you think of?