At home · Pocket budget

The Cardboard Castle Siege

Kids build cardboard forts and play a supervised, soft-ball siege on a budget.

KidsParty gamesBirthday
PLAN
READY
6–12 people High-energy
Best for6–12 people
BudgetPocket budgetEstimate: $15+
LocationOutdoors
EnergyHigh-energy
01

Gather your supplies

Tick these off as you shop, borrow or pull them from the house. The list is a practical starting point, not a claim that every item is required.

02

How to run it

  1. Divide and Build

    Divide and Build: Use only boxes and materials the host already owns or has permission to use. Give teams 30 minutes to build low, stable forts away from roads, pools, electrical equipment and other hazards, with a responsible adult directly supervising.

  2. Decorate

    Decorate: Let each team mark a crest and banner with non-toxic pens. Do not create narrow hiding places, block exits, use pointed flagpoles or ask children to climb on the structures.

  3. Play the Siege

    Play the Siege: Set a soft boundary and use only soft paper or foam balls. Participants stand in marked throwing areas, never throw at a face, stop whenever a ball leaves the zone and use a scoring target instead of chasing a flag.

  4. Clear and Refuel

    Clear and Refuel: Open the space for airflow, check for loose tape and litter, and collect every ball. Serve labelled food at a separate table where nobody is inside a fort or treating a box as a room.

03

A practical run of show

  1. 45 min before

    Divide and Build

    Divide and Build: Use only boxes and materials the host already owns or has permission to use. Give teams 30 minutes to build low, stable forts away from roads, pools, electrical equipment and other hazards, with a responsible adult directly supervising.

  2. 20 min

    Decorate

    Decorate: Let each team mark a crest and banner with non-toxic pens. Do not create narrow hiding places, block exits, use pointed flagpoles or ask children to climb on the structures.

  3. 2 hours

    Play the Siege

    Play the Siege: Set a soft boundary and use only soft paper or foam balls. Participants stand in marked throwing areas, never throw at a face, stop whenever a ball leaves the zone and use a scoring target instead of chasing a flag.

  4. 30 min

    Clear and Refuel

    Clear and Refuel: Open the space for airflow, check for loose tape and litter, and collect every ball. Serve labelled food at a separate table where nobody is inside a fort or treating a box as a room.