Cardboard Fort and Targets

One team builds a low cardboard scene around a floor-level target, the other team tosses soft balls to knock that target down, and then everyone rebuilds and trades jobs.

AgesEarly school age, Older child
Players2 to 6 players
Time20 min setup, 25 min play
WhereIndoors, Backyard

Who it is for

Two to six school-age children, split into builders and tossers who trade places every round. An adult does all cutting and box prep beforehand, sets the throwing line, and stays in the play area the whole time. This is not a game for toddlers.

School-age children are a suggested starting point because the game involves tossing: an adult decides whether this group can follow the throwing line rule.

What you need

Four to eight clean, empty cardboard boxes or flattened cartons in mixed sizes. Delivery boxes saved over a week or two are plenty.
One small, light box or a cardboard tube to be the target. A cereal box or an empty paper towel tube works.
Three to six large, soft balls: foam balls, cloth balls or stuffed fabric balls with no loose fill. No soft balls? Tightly rolled pairs of socks fly well.
Painter’s tape or masking tape for the throwing line and for joining walls. Outdoors, a jump rope or a line of shoes marks the line.
Optional: markers or crayons for decorating the fort.

Space and surface

You need a lane about four to five big steps long with a wall, fence or empty space behind the target. Clear breakables from the lane and from behind it. Indoors, a hallway or a cleared living room works; outdoors, use level grass away from the street.

Set it up

Adult job first: remove staples, plastic, straps, string, tape loops and address labels from every box. If any cutting is needed for windows or battlements, an adult does it before children arrive and puts the tool away.
Pick the target spot on the floor at the far end of the lane, with nothing fragile and no walkway behind it.
Tape a throwing line on the floor three to five big steps from the target. Start closer than you think you need.
Builders arrange boxes as low walls, towers and gateways around the target spot. Walls are scenery to toss past, so keep them below the builders’ waists and never roofed over.
Builders stand the target on the floor inside the scene where tossers can see at least part of it.
Builders walk back behind the throwing line. Nobody tosses until an adult says the fort area is empty.

How to play

Tossers stand behind the line and take turns: one soft ball per turn, underhand.
The aim is the cardboard target only. A toss that hits a wall still counts as a turn.
When the target falls over, the round ends and everyone cheers for both the toss and the fort that lasted that long.
Nobody crosses the line to collect balls until every ball has been tossed and an adult calls “collect.”
Builders and tossers trade jobs. The new builders may redesign the whole scene.
Balls are for the target. A ball tossed toward a person ends that player’s turns for the round.

How it ends

Play an even number of rounds so both teams build and toss equally, then stop. For a cooperative version, drop the teams: everyone builds together, everyone tosses, and the group counts how many total tosses the fort absorbs before the target falls. A sturdier or sneakier design next round is the shared win.

Make it easier or harder

Easier

Use a bigger target, such as a shoebox standing on end, and move the line one step closer.
Leave the target out in the open in front of the walls.
Skip teams and let everyone toss in turn at one shared build.

Harder

Builders may hide the target so only a narrow slice is visible from the line.
Move the line back one step after each round the target survives.
Add a rebuild timer: builders get two minutes to design, counted out loud, if the group enjoys time pressure.

Indoors and outdoors

Indoors, rolled socks are kinder to lamps and picture frames than balls, and a hallway makes a natural lane. Outdoors, wind will push empty boxes around, so set a shoe or a folded towel inside each wall box to steady it, and face the lane so nobody tosses into the sun.

Mixed ages and different abilities

Give younger players a closer line marked in a second color of tape.
Pair an older child with a younger one as a build team: the younger one chooses where the target hides.
A grandparent or adult can be the official caller who announces “toss” and “collect.”
Seated option: tossing underhand from a chair or wheelchair placed at the line works the same way. One way to try this is to give seated players their own closer line.
No-throwing variation: roll the ball along the floor at the target instead, or skip the tossing and make the round about building a scene and telling the group what it is.
Lower-movement option: a player can be the architect who directs where each box goes while teammates carry and place.
If loud collapses bother a player, use rolled socks and a paper tube target, which fall quietly.

When it goes wrong, and how to reset

The common failure is the first toss flattening everything, or twenty tosses hitting nothing. Either way the fix is the line, not the players: move it back a step if rounds end instantly, forward a step if nobody connects. Then rebuild and go again.

Safety notes for this game

Only an adult cuts cardboard, and the knife or scissors leave the play area before the game starts. Check cut edges and tape over any that feel sharp.
Fort walls stay low and open. No roofs, no closed boxes anyone could crawl into, nothing a child sits on, stands on or leans against, because cardboard walls fall over and cartons collapse.
Soft, large balls or rolled socks only. No hard balls, rocks, toys with weight in them or anything small enough to be a choking risk.
Targets are cardboard. Tosses go toward the target and never toward a person, a pet or a window.
Nobody stands, sits or walks behind or beside the target while balls are being tossed. Collect only when an adult calls it.
Outdoors, set the lane well away from the street and the driveway so a rolling ball never leads a child toward cars.
Remove staples, plastic wrap, straps and tape loops from every box before play, and keep plastic packing out of reach.