Build a Castle

Build a stone castle, an ice castle, or a sand castle, simply by choosing your background, and then bringing up the accompanying parts sets. You can rotate, flip, and resize the parts - have lots of fun with this game!

http://www.highlightskids.com/Magazine/Feb07/h1magazineFlashObjects/h10207FebruaryArtist.asp

MOH'S DRILL & THE CASTLE OF DOOM!

Uh-oh! The walls are closing in on you in this castle! You need to quickly choose drill bits to drill through various materials in the castle wall. Each drill bit selected must be related to the material that you need to drill through, as it relates to Moh's hardness scale in geology (rocks and minerals).
http://www.fossweb.com/modules3-6/EarthMaterials/activities/mohsdrill.html