Students learn about design, teamwork, and precision as they work together to engineer a castle. Students are introduced to various European castles and blueprints to give them background knowlege for this STEM/STEAM activity. This presentation includes a foldable book where students sketch out a blueprint of their design, work together as a team and choose a blueprint, create, and then present their finished product. A "Practice Presentation" worksheet is included to assist students in preparing to share their team design. Links for futher study of castles has been included as well.