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June 11, 2026 ยท 8 min read ยท by Nick Reef

The Cardboard Castle Siege That Took Over Our Weekend

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How a rainy Saturday turned into an epic cardboard castle siege with knights, trebuchets, and teamwork lessons.

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The Cardboard Castle Siege That Took Over Our Weekend

The Rainy Day That Sparked Creativity

What started as a simple craft project on a dreary Saturday morning quickly escalated into a full-blown medieval siege in our living room. With three daughters (Mary, Megan, and Hailey) and a house full of cardboard boxes left over from recent deliveries, we had the raw materials for something epic. The labs were curious but kept their distance, and our orange cat Max spent most of the day hiding under the couch, clearly unimpressed by the chaos.

Building the Castle

Mary, the eldest, took charge of castle design. She sketched out a plan that included towers, a drawbridge, and a surprisingly intricate dungeon. Megan, our middle child, focused on creating shields and swords out of cardboard and duct tape. Hailey, the youngest, was mainly interested in decorating everything with glitter and markers. We used Heavy-Duty Duct Tape to reinforce the walls and Craft Scissors to cut out intricate shapes for windows and battlements.

The building process was chaotic but rewarding. I helped with structural engineering (read: making sure the castle wouldnโ€™t collapse at the first sign of battle). We used a mix of cardboard boxes, packing tape, and sheer determination to bring the castle to life. By lunchtime, we had a two-tiered fortress complete with a flagpole made from a broomstick and a paper flag designed by Hailey.

A cardboard castle with a drawbridge and towers set up in a living room.

Preparing for Battle

With the castle complete, the next step was arming the troops. Megan and Hailey teamed up to create a collection of shields and swords. They used Foam Sheets for padding and decoration, making sure everyone had their own personalized gear. Meanwhile, Mary and I worked on a cardboard trebuchet, which turned out to be the highlight of the siege.

The trebuchet was a marvel of DIY engineering. We used a wooden dowel, rubber bands, and a plastic cup to create the launching mechanism. After a few test runs, we managed to launch crumpled paper balls across the room with surprising accuracy. By mid-afternoon, the castle was under siege, with Mary defending the fortress and Megan and Hailey leading the attack.

The Siege Begins

The battle was intense. Mary stationed herself inside the castle, armed with a shield and a stash of paper balls. Megan and Hailey strategized their attack, using the trebuchet to launch projectiles while attempting to breach the drawbridge. Max, the cat, made a brief appearance before retreating to his hiding spot under the couch.

The labs, sensing the excitement, barked and wagged their tails but wisely stayed out of the fray. The siege lasted for hours, with each side claiming victory at different points. By dinner time, the castle was in ruins, but the smiles on the girlsโ€™ faces made it all worthwhile.

A cardboard trebuchet launching paper balls during a family game.

Lessons Learned

This cardboard castle siege was more than just a fun activityโ€”it was a lesson in teamwork, creativity, and problem-solving. Mary learned the importance of delegation and planning, Megan honed her crafting skills, and Hailey discovered the joy of contributing to a group project. Even Max learned something: always check for cardboard fortresses before entering a room.

Cleanup and Reflection

The aftermath of the siege was a mess. Cardboard scraps, glitter, and crumpled paper balls littered the living room. We spent the evening cleaning up, which was almost as fun as the activity itself. The girls took turns vacuuming, and I used Heavy-Duty Trash Bags to collect the debris. By bedtime, the living room was back to normal, and the girls were already brainstorming ideas for their next project.

A family cleaning up cardboard scraps after a fun craft project.

Frequently Asked Questions

How can I make a sturdy cardboard castle?

Use large boxes for the walls and towers, and reinforce them with heavy-duty duct tape. Adding internal supports, such as rolled-up cardboard tubes, can also help. Be sure to cut windows and doors carefully using craft scissors.

What materials are best for crafting shields and swords?

Foam sheets are excellent for padding and decoration, while cardboard provides a sturdy base. Duct tape can be used for reinforcement, and markers or paint add a personal touch.

How do I keep pets safe during a cardboard crafting session?

Ensure pets have a quiet space to retreat to, away from the chaos. Avoid leaving small pieces of tape or glitter on the floor, as these can be harmful if ingested.

#family-games#diy-projects#cardboard-crafts#teamwork#rainy-day-activities
Nick Reef โ€” OpsHQ Go author and Pacific Northwest dad

Written by Nick Reef

Nick is the Pacific Northwest dad behind OpsHQ Go โ€” software engineer by day, parent of three by night. Everything here is tested first-hand by our family of five (plus three labs and an orange cat): recipes cooked in our kitchen, trails hiked on real weekends, games played at our table.

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