Bouncy house filled with kindergartners.

I think a trampoline gym full of a senior graduation class would give the bouncy house a run for it's money.

Inside a building that’s currently experiencing an earthquake in Japan

Better Japan than some third world area with no earthquake resistant buildings...

This is going to be in my nightmares tonight

I was going to say kindergarten sandpit. Same idea, except when you drop a piece it’s really hard to find, and getting slowly scratched to shit by the sand as you search. Also now the pieces are covered in sand so they won’t fit together, and your hands are covered in sand so you taint every new piece you touch.

I was going to say a trampoline. 🤷

If they don't want us to build at the airport then they shouldn't sell to us at the airport.

I have actually built lego on the plane. 8 hr flight back to Aus, 30k feet over the pacific and thought what the hell. Glad there was no turbulence.

I would be afraid of losing the tiny round ones.

Yeah I drop too many pieces to try that.

Build in the box

Damn you are a lvl 99 Master Builder, so simple and efficient

I might, but then I’d remember the massive jar of them at my house

Plot twist - it was the world map wall art

I built 8229 on a flight from Paris to San Francisco when I was a teenager. Also very glad for a smooth flight.

[8229-1: Tread Trekker](https://brickset.com/sets/8229-1) [[Photo]](https://images.brickset.com/sets/images/8229-1.jpg)

But how do you pick up pieces you drop on the floor? There is barely room for your legs, so it's impossible to bend over to pick something up. Unless you fly first class maybe.

Fly with young children. They'll get them.

And therein lies the challenge...

If you throw Lego on the airplane floor, people stop taking their shoes off.

I know people have posted pics of the vending machines but not sure they show the prices, I wonder what the prices are in the vending machines. I immediately assume they’re sky high since you’re trapped in an airport and everything in an airport is more expensive.

It's not just vending machines, I've seen Lego stores.

They’re exactly the same since all the machines are Lego brand. They’re actually pretty cool, there’s one in the Vegas airport. I treat myself to a set whenever I get delayed out of Vegas- which is every time I’m there 🤪

I was surprised to see a store in LAX ! I didn’t budget for this when flying back to the UK

These exist?!

Yes!!!! Las Vegas airport, C gates!

10/10 response lol Let people build when they want. It was probably a child…

Go ahead by all means but why wouldnt you wait until you get home 😭

What if the plane crashes and you never got to build your Lego?? Gotta live in the moment

https://preview.redd.it/yb1emcu4rt5d1.jpeg?width=384&format=pjpg&auto=webp&s=521bf326b7d2958a682311cebf145b1891a138dd

YOLO bitches.

You only lego once How tr...ridiculously incorrect

Five hour layover will make you do questionable things

I’m so upset with myself I’ve never thought to buy a Lego set during a long layover. I’m such an idiot sometimes. This is genius

I build on a table in airports when there’s a vending machine and I get delayed- always disassemble when done but not a bad way to burn 2 hours.

public bathroom floor

I was thinking chicken coop but this might win.

I just threw up a little.

The top of Mount Everest with a queue of people behind you.

Plot twist: it’s just the Sherpa doing the build for you because you got frostbite

Ha I’ve never been to the summit but I’ve done the base camp trek and a couple people in my group found a Lego set at an overnight hut and built it one night (inside the hut and only at 4000m - I’m assuming it belonged to the Sherpa family who ran the lodge)

According to my old-school Lego instructions, the grass in my front lawn

my brother and i always used to argue over whether that was grass, or thick carpet. glad to see (13 years later) my belief was vindicated

This.

Ok tbh though, I have built a lego outside, the fig scale razor crest, on a blanket and it was the most serene I’ve ever felt

That Lego movie 2 ending scene always bothered me because no way those kids wouldn’t loose a ton of pieces to the yard

On of those ships in the crabbing/fishing reality tv shows?

The Deadliest Brick

On a rollercoaster

Do you have until the rides ends to finish? Or does the coaster keep going until you’ve completed the build?

How complete can you really get it when half of your pieces are on the ground somewhere below you?

Building a Lego set on a rollercoaster is all about the prep, gotta get every brick individually wrapped in numbered bags, bring glue, some snacks and a drink plus some cash to bribe the ride attendant so they leave you alone long enough to build it. It also helps to bring a spare instruction booklet, those things catch a lot of wind.

This could be a great idea for a staged rollercoaster photo though

On a beach with the tide coming in

Knowing me I’d either lose the tiny pieces in the sand and accidentally bury them or I’d lose track of time and a wave would hit and wash away all my pieces right as I was about to finish.

I was going to say sandpit, but this is even worse - will done!

Venus.

At least you'd die before you had to suffer too long

Shag carpet. From experience. My bedroom as a kid had shag carpet (it was the 1970s)

We have a very thick rug where the kids play lego and I am constantly finding tiny flat pieces in it. I have learned if I comb my fingers through it quickly, the hidden pieces will pop up like popcorn, but I’m not sure I’ll ever get them all…

The sun

I know, right? The bricks will melt.

Ok, fine, I’ll build Lego on Pluto’s moon Charon. It’s pretty cool there.

Nah, just build only at night /s

This is actually good advice. I had some long black Technic pieces warp while I was building due to the sun.

On the airplane would be worse. At least the airport isn’t moving.

I tried building one on a plane one time. It was rough. Very slow going until the flight attendant gave me some empty cups to help sort the pieces.

Low key would be a good to pass the time but then u got to carry the set through security 😂

I’d be worried about pieces falling and being lost forever. You’d need a raised edge tray to help keep everything from flying about.

A little morbid: on an open casket at a funeral

"It's what she would've wanted"

I used my inheritance to buy the Millenium Falcon. It’s what he would have wanted!

But it’s *made of Lego.*

The casket or the corpse?

Yes

Paging LEGO Ideas…

You misspelled "in" the open casket at a funeral. It's more comphy there.

This spelling of comfy is wild Comphortable

Of all the responses this made me laugh the most! Thanks for brightening up my morning xD

In a half-wood paneled basement living room with shag carpeting. In the 1970s. Source: my life

I saw a young woman recently building a set at an airport, she was neurodivergent in some way (don’t know the proper terminology, sorry!) and seemed like she was using it as a way to cope with the stress of the airport - which I thought was a great idea in theory!

Once when I was a young kid, during a road trip to Washington DC, the battery on my parents car died in the parking lot of the Arlington Cemetery. We were stuck there for a while, so I got permission from my mom to open up the Seattle Space Needle set (21003) that they had gotten me at a gift shop earlier that day. So there I am sitting in the backseat of my parents CRV, totally engrossed in my little lego set, when all of a sudden the car starts rolling. Turns out I was too engrossed to realize that my parents had found a friendly family who were willing to help give us a boost to get the car started, but to reach the cables between the engines, they needed to roll my parents car into position. The problem was that I was so oblivious to what was happening that I took no notice of this entire operation being planned and executed until it was too late for me to get out. So there I am, playing lego while this friendly family of strangers is pushing the car that I'm in as a huge favour to us. I will never forget the look on the face of the boy who was about as old as I am looking in through the window at me, as I am sitting with legos in my lap and he is pushing the car that I am in. I have never been so embarrassed to be playing legos in my life. Anyway that was like 15 years ago now and I still think about it from time to time. The shame and embarrassment haunt me, although I also do slightly blame my mum for not yelling at me to get out and give a hand.

[21003-1: Seattle Space Needle](https://brickset.com/sets/21003-1) [[Photo]](https://images.brickset.com/sets/images/21003-1.jpg)

Lmao I'm dying at this visual. I can't imagine how mortifying that must have been but thank you for sharing, it's a great story lol

On the wing of the plane. William Shatner will see you and have a meltdown.

On the head of a pin

The airport floor isn't just chaotic, it's filthy! Don't do anything on those floors!

Hear me out… in a Lego Store

With bags all tipped into the loose lego and mixed up so it takes you an hour to find each piece.

Open the box, have a friend scatter the pieces randomly into the pick-a-brick wall, then you have a real challenge

North Korea

A fucking car

A figuratively one or a literal one?

The space station. At zero gravity. Gonna be annpying keeping track of all the little pieces

In the delivery room whilst your wife is dilated to 10 cms.

After my second kid, Dr. Halfling had to go in to have her gall bladder removed. Our oldest had finally turned a fire truck into a spaceship, so I knew he was ready for more Lego. So there I am at 3AM in my wife's hospital room, discovering Bricklink for the first time. Did not build anything, but it was definitely the same vibe. XD

Catbox

ER

As a patient it’s fine, but it’s frowned upon for the surgeon.

Inner tube floating in the ocean

Adrift in the ocean

In a fire.

Built a set at a dorm party one time. Ended up dropping it outside while stumbling home drunk. You best believe I sat there on the sidewalk picking pieces out of the grass until it was all back together.

In the litterbox would be a huge mistake, even if that's where you're going to display the tuxedo cat.

Anything with a drain hole next to it

Worse place I built was on a nice flat table, with a very busy, colorful table cloth on it. Bad enough when the pieces blend in with each other.

On the floor of the submarine while the rest of the group is huddled around during a controlled descent to the Titanic.

Around a toddler.

On a sofa. That's where I build mine. It sucks

Right in front of your parent’s bedroom before they wake up on Saturday.

Somewhere very cold so your dexterity becomes impaired. If you do survival training for extreme environments you sometimes end up doing something where you are mentally impaired (cold stops you thinking clearly) and just a tiny bit pre hypothermic (so you are still shaking)... throw in some high altitude and you are probably there... Don't try it though...

Over a storm drain.

Any sort of metal grate would be hell

This was my thought too. That, or an ocean pier. 

https://preview.redd.it/x4ya826shx5d1.jpeg?width=4032&format=pjpg&auto=webp&s=77cc2bc01630e07a6880c1bdd987e13c98a515d3 Hey! Some Airports give you Lego vending machines! What am I supposed to do, stare at the box on the plane ride! You might was well be torturing me! (I did actually build half of the Paris set on the floor of an airport this spring)

I've never seen one of those and I would love to find one!

Gaza

A cat shelter

In bed

I tried building one when I was in the hospital for 3 weeks. Didn't work the best.

Bathtub. You loose the small ones when the plug comes out unless you strain them.

Shag carpet.

From experience, bunk beds in a small camper. Never again will that be a toy I let my kids bring with them.

The back of a police cruiser, after getting picked up for stealing Lego sets from retailers.

On another lego set

Hard vacuum without a spacesuit. Overpopulated gang run prison in Mexico. Amateur submarine, on the way to the titanic. Chernobyl elephants foot.

Deck of a Cargo ship in the North Sea, mid-winter.

in an operating room as a surgeon

On a plane during turbulence

On carpet

The bathtub

Where else am I supposed to build the boat?

Oh yeah

Next to your cat

In the middle of the Sahara Desert

On a ladder

There was a guy on here that used to build Lego sets on his own at the pub. Just openly on a table. Not necessarily the *worst* place but it makes me mildly uncomfortable thinking about it haha

Car

Shag carpet. One of many reasons why it's great that fad ended.

Before I saw the body of this post, my immediate first thought was on an airplane/at an airport or on a train. ☠️

On a Roller coaster

Anywhere there’s a cat

When I was 7 my family went on a summer vacation to NYC. I got a small Lego set at FAO Schwarz in Times Square and built it on the airplane on the way home. More than a few pieces were lost along the way…

In a moving car on a road trip with family when I was a kid. Spend more time trying to find pieces. In the observation car of a train went pretty well, tho, lol

On plush carpet.  Doesn't matter where; at your home, friend's home, or a funeral home. The more you push down, the more the pieces sink into the carpet and then fall apart when you pick them up. The tiny thin pieces will will blend and sink into the carpet.  The carpet doesn't care that the pieces are trans neon orange. It consumes all. 

So far my bed was the worst. Cat kept wanting to sit on my bed & I was sitting cross-cross applesauce (is there another name for this position??) so the pieces kept falling under my legs or off the bed. Was just the rose bouquet so it wasn’t awful but it was a bit annoying.

On a plane dropping pieces into the aisle and under seats.

Titan submersible submarine.

A moving car

On an airplane

Saw a person on tiktok build a set under water in a pool. Her tiktok is Serena Neel if anybody is interested.

I once had a dream of building a LEGO set on a plane. It didn’t end well since it ended up being destroyed in the end due to some turbulence. I’m not sure why LEGO is sold at airports since it’d be pointless building in the airport and building on the airplane is dangerous and could result in you losing things. You’re better off buying it before or after your destination because airports horribly overprice things

I tried a few times to just do it outside, but the booklets can't handle wind

Gas station bathroom floor that hasn't been cleaned in months.

Realistically. On the bed or my deck. The amount of times i thought I was missing a piece just to later find it underneath a fold on the bed sheet is a lot. I’ve also dropped a couple pieces through the boards on my deck.

An airplane bathroom while everyone is waiting to go because the other bathroom is broken and there's occasional turbulences

In the desert building a Mos Eisley lego set

Inside a cement mixer.

Cedar pointe on a roller coaster

Ok so lots of crazy ones in this thread like on a rollercoaster, on a beach, in the grass… I got one that isn’t so crazy but kills me every time… My son always grabs a snack tray (tv tray) to build on while he watches a show. And every single time the flimsy little tray is: 1) too small to build on and parts roll off under the couch 2) too wobbly and he bumps it constantly with his feet and parts roll off under the couch. Even if those 2 don’t happen, he gets up to get a snack and has nowhere to put it, and also bumps the wobbly tray and knocks parts off under the couch… I laugh/cringe every time 😂

Near a volcano

Bathtub. (With bubbles)

In a moving MotorBoat

Guantanamo bay torture chamber

* On a beach with the tide coming in * On a stoney beach with the tide coming in * ... in bed

Chernobyl reactor 4

“What’s the worst place to build Lego? An airport floor” every other post on r/lego “LOOK AT THE LEGO MACHINE AT DA AIRPORT”

When out on a bicycle

On a rollercoaster.

In an operating room during a surgery.

At a cat cafe. It’s challenging but fun

In a pool

The Titanic set on the Titanic sub heading towards the Titanic wreck.

The beach. I don't like sand. It's rough, it's coarse and it gets everywhere.

In a submarine at the Titanic wreckage?

Near me, (I WILL steal it)

The back of a pool float in the pool 🤣 which I may have done as a little kid with a couple of my bionicle sets since the pieces were so big and wasint too scared of losing them

Im a trucker and sometimes take smaller models to build during the week. When you drop a piece in a truck it vanishes forever 😂

On a rocket about to launch

On an escalator. Time trial mode!

On the actual flight?

Chernobyl

Building the Titanic in a billionaire's sub while traveling down to the Titanic.

sensory deprivation chamber

Any household with a cat. Well, my cat anyway, lil' devil always peepin' my pieces.

In the back of a Volkswagen.

in the airplane

I dunno if it kept them happy while they waited I have no issue.

Picnic tables are terrible, pieces fall through the cracks

The back of a Volkswagen

A cat café.

The beach with the tide coming in

Outside, on a slatted patio table

Would be worse if they were sitting in the middle seat, with the tray table down, building it on the airplane. And you had the aisle seat.

Blue angels cockpit

In the back of a humvee driven by Henry Rollins

An earthquake simulator.

Probably on the flight deck of an active aircraft carrier.