If you're going to build a cardboard castle for your cat, you might as well make it an epic one. We made ours extra royal with a festive drawbridge, twin towers, grass courtyard, water feature ...

Instead of leaving the walls plain, the designers cut out around 500 cardboard squares to mimic the look of bricks and stuck those on the outside. No castle would be complete without a drawbridge ...

The kings of the creative challenge used 500 pieces of cardboard from the trash and around 80 glue sticks for the masterpiece, which had a fully-functional drawbridge and stood nearly 10-feet-tall.