Ball Play — Ball Pits & Ball Walls, and the Physics They Teach

01 / Two families

There are two ball exhibits.
They are quoted differently.

Almost everything sold as ball play is one of two products, and confusing them is why ball budgets go wrong. A ball pit is bought by floor area: a bounded volume of balls drawn to your room, with depth, edge and a cleaning regime. A ball wall is bought by the module: a run of wall-mounted mechanisms on one grid, each taking a single ball and handing it on. The pit is where the ball lives. The wall is where the ball works.

Ball pit

球池 Quoted by the square metre

A bounded volume of balls, drawn to your room. Area, depth and edge profile are the design decisions; the ball count follows from them.

Sold by: Square metre of floor
Ball count: ≈900 per m² at 450 mm
Balls move: All at once, by hand
Install: Floor, edge, mat, net, washer
Lifecycle: Wash cycle, mat lift, ball cull
Buyer asks: How many square metres, how many balls?

Open the ball pit family → B

Ball wall

球墙 Quoted by the module

A run of wall-mounted mechanisms on one grid. Each module takes one ball and hands it on; the wall is as long as the room allows.

Sold by: 1200 mm module
Ball count: One ball per visitor at a time
Balls move: One at a time, by mechanism
Install: Rail, back panel, return chute
Lifecycle: Re-order modules, swap one out
Buyer asks: How long a wall, which mechanisms?

Open the ball wall family →

Quoted separately. Sized together.

The two families only work as a loop. A ball leaves the pit, climbs a lift, works its way down the wall or through a drop, and lands back where it started. A wall bought without a return run arrives with a blower that is too loud; a pit bought without a wall is forty thousand balls with nothing to do.

01Pitthe ball rests

02Liftthe ball climbs

03Wall / dropthe ball works

04Returnthe ball falls home

02 / Why ball play

The exhibit that runs itself.

Ball play needs no instructions, no staff and no power to work. That is exactly why it is the hardest kind of exhibit to specify well — everything that goes wrong does it quietly, in year two.

Zero instruction

A child is in the pit before the parent has finished reading the sign. No buttons, no sequence, no wrong way to do it — which is why ball play absorbs the overflow from every other hall.

The highest revisit rate

Ball play is the reason a family comes back in three weeks rather than in a year. It is the anchor the rest of the building borrows footfall from, and it is the first thing a returning child runs to.

The maintenance is the product

Anyone can buy a net and a thousand balls. What separates a pit at year three from a pit at month eight is the ball washer, the air path, and the detail that stops a ball jamming at 1.6 m.

03 / What it teaches

It reads as play.
It is a physics hall.

A ball gallery is the cheapest physics gallery a museum can build, because every machine in it is a demonstration that runs without power, staff or explanation. Western science centres sell ball walls on exactly this basis — Bernoulli's principle, stored energy, simple machines — and the labels do the rest. Canadian and American fabricators advertise a ball wall by naming the principles it demonstrates. Here is what our range demonstrates, and the line we would put on the panel.

Bernoulli's principle

Air pressure · aerodynamics

Fast-moving air has lower pressure than the still air around it, so a ball dropped into a vertical air stream is pushed back into the middle of the stream and floats there. It is the same effect that lifts a wing, and the same reason you are told to stand back from a platform edge. Our air cannon, air maze, balloon lift and pedal blower are all built on it.

Air cannonAir mazeBalloon liftPedal blower

Panel copyThe air is moving fastest in the middle of the stream — and fast air pushes least. The still air outside pushes the ball back in.

Stored energy

Gravity · potential to kinetic

Every ball lifted to the top of a wall carries energy it will spend on the way down. A cascade tower, a coaster loop and a stepped drop are the same experiment at three scales: height in, speed out. Nothing in the zone works unless something else has already paid to lift the ball.

Bountiful harvestBall coasterStep drop towerRamp track

Panel copyThe ball has not done any work yet. Everything it is about to do was paid for on the way up.

Simple machines

Screw · wheel · lever · gear

A spiral lift is an Archimedes screw. A ferris wheel is a wheel and axle. A tipper is a lever with a counterweight. The classical simple machines are all present at child scale, and none of them are labelled as such — which is exactly why they work.

Spiral ball liftBall ferris wheelBalance beam wallGear wall

Panel copySix simple machines move everything in the world. This wall has four of them.

Probability

Distribution · chance

Drop one ball through a field of pegs and nobody can say where it lands. Drop a thousand and the pile underneath takes a shape you can predict exactly. Our probability sorter and probability combiner are Galton boards: the classic demonstration that individual chance and collective order are the same thing.

Probability sorterProbability combinerBall maze wall

Panel copyNo single ball is predictable. Ten thousand balls are.

Momentum and collision

Mass · speed · energy loss

A heavier ball spins a three-arm spinner further. A ball threading a field of posts arrives at the bottom slower than anyone expects. Both are momentum and energy loss, felt before they are understood — which is the order children learn in.

Spinner wallPath wallBounce & arch

Panel copyWatch the spinner. Then try a heavier ball. Then explain why.

Panel graphics are supplied as vector artwork in your typeface and language, blank or pre-printed. The physics is written by us; the voice should be yours.

05 / One hall, planned end to end

Thirty metres of wall,
one ball running through it.

The largest ball gallery we have built runs 30 × 18 m under a 6.4 m ceiling. Sixteen machines share one ball spec: a ball leaves the pit, goes up a spiral lift, crosses the room on an overhead track, drops through a maze and lands back in the pit. Nothing is a standalone unit — the lift is sized by the drop it feeds, and the drop by the pit underneath it.

Axonometric view of a 30 by 18 metre ball gallery with sixteen ball machines

30 × 18 mgallery footprint

6.4 mclear height

16machines on one ball spec

1ball size across the whole hall

07 / Build and maintenance

A ball pit is a machine
that happens to look like a toy.

Balls, air, steel and structure. Four things decide whether the zone is still open in year three — and none of them are visible in a render.

Ball specification

φ75 mm food-grade LLDPE as standard, in a wall thickness that survives a full adult step. Anti-static and odour-free, with masterbatch colour rather than paint — painted balls flake into the pit within a season.

Air path and noise

Blower, pipe diameter and run length are sized together. A 75 mm ball needs different pressure from a 90 mm ball, and every bend costs pressure — which is why walls bought as a kit usually arrive with a blower that is too loud.

Cleaning and disinfection

The ball washer is part of the quote, not an accessory. Balls run on a wash cycle, the pit is swept nightly and the mat is lifted on a schedule. A pit without a washer is a pit that gets closed in month eight.

Structure and safety

Edge height, net tension, fall height and padding thickness are set against the age band the pit is sold for. Frames are rated for a full ball load plus a hanging child, and every release point is guarded.

Power — every blower, pump and controller runs on a universal 100–240 V AC, 50/60 Hz input, so the same zone ships to Japan at 100 V, the United States at 120 V, the UK and Europe at 230 V and Hong Kong at 220 V with no step-down transformer. Long air runs are built to 380–480 V three-phase.

Systems and specifications → Send a floor plan

Balls are the one exhibit
nobody has to explain.

There are two ball exhibits.
They are quoted differently.

Ball pit

Ball wall

Quoted separately. Sized together.

The exhibit that runs itself.

Zero instruction

The highest revisit rate

The maintenance is the product

It reads as play.
It is a physics hall.

Bernoulli's principle

Stored energy

Simple machines

Probability

Momentum and collision

A wall is a number of modules.

Thirty metres of wall,
one ball running through it.

One zone, drawn twice.

Wall runs, one hub, one route

The same hall, dimensioned

A ball pit is a machine
that happens to look like a toy.

Ball specification

Air path and noise

Cleaning and disinfection

Structure and safety

Send us your exhibit list.
We will come back with a price.

Balls are the one exhibitnobody has to explain.

There are two ball exhibits.They are quoted differently.

Ball pit

Ball wall

Quoted separately. Sized together.

The exhibit that runs itself.

Zero instruction

The highest revisit rate

The maintenance is the product

It reads as play.It is a physics hall.

Bernoulli's principle

Stored energy

Simple machines

Probability

Momentum and collision

A wall is a number of modules.

Thirty metres of wall,one ball running through it.

One zone, drawn twice.

Wall runs, one hub, one route

The same hall, dimensioned

A ball pit is a machinethat happens to look like a toy.

Ball specification

Air path and noise

Cleaning and disinfection

Structure and safety

Send us your exhibit list.We will come back with a price.

Balls are the one exhibit
nobody has to explain.

There are two ball exhibits.
They are quoted differently.

It reads as play.
It is a physics hall.

Thirty metres of wall,
one ball running through it.

A ball pit is a machine
that happens to look like a toy.

Send us your exhibit list.
We will come back with a price.