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33 votes
2 answers
19k views

How do you repair yellowed or faded LEGO blocks?

In particular, I've had white blocks that have yellowed in places. Can the colour consistency be restored? Or at least improved? I'd be more interested in people's actual experiences rather than ...
7 votes
5 answers
2k views

What are good DUPLO projects for around 2 year olds?

It is always good to have a bunch of (short) building projects to suggest to our toddlers. Here I would like to collect some easy ones for DUPLO. I'm not particularly interesting in creating ...
12 votes
2 answers
444 views

What is the length of a DUPLO train bridge?

I'm trying to plan a DUPLO train track layout to order but I currently don't own any pieces. I'd like to include a bridge like the one in set 3774, but I'm unsure if it will fit my layouts. Can ...
12 votes
2 answers
15k views

Website with layout plans for LEGO Duplo trains?

Can anybody suggest a web site with plans for LEGO Duplo trains? I've searched the net for a while without any interesting results. Any hints appreciated!
3 votes
2 answers
296 views

Connecting a Lego PF M motor to computer

Can you connect the Lego Power Functions M motor to a computer with USB?
6 votes
2 answers
1k views

LEGO Power Function PF 2.0 specification

Does anyone have the new Power Function 2.0 specification or pin out?
6 votes
2 answers
2k views

Port problem? Mindstorms EV3 brick doesn't detect sensor blocks

I've just bought a second hand Mindstorms EV3 home edition set but the ports aren't detecting any of the sensors just the motors. When checking the ports on the EV3 brick it says "none". I've updated ...
0 votes
1 answer
89 views

Designing a customized, life-sized model/copy of flower vase

I am a noob! I am trying to create an anniversary a present. I want to create a life-sized LEGO, customized vase, that was given to me as a present. I plan on putting Lego flowers in the vase. I have ...
7 votes
1 answer
120 views

Minifigure overview and Combinator

Does anyone know a website or program which provides an easy overview over LEGO minifigures and allow me to recombine parts from different minifigures and show me kind of preview picture?
-3 votes
2 answers
118 views

Can I buy replacement bags through Lego?

Several years ago I bought the Millennium Falcon through AliExpress for my son. He began putting it together but I think he was a little too young at that point and he abandoned it. Now he wants to ...
1 vote
0 answers
38 views

How to fix yellowed white DUPLO boat? [duplicate]

I have a large white DUPLO piece for the Sea Explorer. Part of it is yellowed. Not sure how… I thought maybe it was sun damage but not sure why that would cause it to turn yellow. I’ve already soaked ...
11 votes
12 answers
4k views

Which parts do not have the LEGO logo stamped on them?

As noted in this question, there are very few parts that do not have the LEGO logo included during manufacture. But which parts are those? Is there any semi-exhaustive list? Does bricklink note this ...
2 votes
1 answer
4k views

How do I identify a new sealed bag of Lego

I've bought the Lego set 11019 Fun Functions for my daughter. Bag number 5 isn’t in it just a blank bag plus the pieces don’t match up with the helicopter instructions number 5 is supposed to make. ...
2 votes
1 answer
90 views

Verifying if "Hinge Vehicle Roof Holder 1 x 4 x 2 (4214)" in blue and white is LEGO

I found a blue and a white versions of what appears to be Hinge Vehicle Roof Holder 1 x 4 x 2 (4214) in a bulk LEGO donation but it does not have "LEGO" stamped anywhere on it. The white ...
7 votes
6 answers
2k views

Is "modular" just a theme, or is it bigger?

I first heard of "modular" in the Lego world about the series of modular buildings in sets produced from 2007 onward. The architecture seems to be 1800s to late 2000s. Then read that the ...
0 votes
1 answer
257 views

Is the NASA Space-Shuttle the object with most reproductions in LEGO sets?

Even within the last twenty years, there have been a large number of LEGO reproductions of NASA's Space Shuttle, e.g. 31117 Space Shuttle Adventure​ 31091 Shuttle Transporter 10283 NASA Space Shuttle ...
2 votes
1 answer
47 views

Are there duplo bricks 1x4x1 and 1x2x1?

My kids like to build buildings and play with them, and for some reason they prefer the Duplo size to LEGO. I would like to give them less squatty looking walls, and am wondering if they have 1x4 and ...
0 votes
1 answer
258 views

What is this micro Mega Bloks element?

I've got this Mega Bloks brick that's a 2x4 and it's smaller than the standard brick, it's 3/4"x3/8" and half the height as the standard brick. It was attached to a vehicle frame that also ...
13 votes
2 answers
1k views

How accurate is the model 42179 Planet Earth and Moon in Orbit?

The set 42179: Planet Earth and Moon in Orbit is described as a learning aid: "kids aged 10+ will love learning more about our solar system". For this purpose, the question arises: just how ...
1 vote
2 answers
749 views

Mindstorms EV3 - Continuous low battery alarm

My son is facing an issue with his Mindstorms EV3. Every time he turns it on a low battery alarm is displayed and it shut downs. This happens regardless of the batteries, we have tried 12 different ...
5 votes
1 answer
304 views

Battery Box 8881 not providing enough power

I bought a used 8881 PF AA battery box. It doesn't appear to work with anything. When I test it with a multimeter, I only get a voltage reading of ~0.5V. I tested each of the batteries, and they each ...
3 votes
1 answer
110 views

Create a gimbal like structure with Technic gears

I would like to attach a sensor to a plate, and tilt that plate slightly in the XY direction respectively, without moving the plate itself. Similar to this (force feedback joystick concept) like this ...
-1 votes
0 answers
89 views

Anyone has the 42110 model fully built as a .io file?

I am trying to design a new RC model. But I was trying to find a fully built model as a .io file. It was missing... So I need to build it again. so I need your help guys! Please send me the .io file ...
2 votes
1 answer
72 views

How can the 42180 Mars Exploration Rover be motorized?

The 42180 Mars Exploration Rover has a sturdy Technic frame with plenty of empty space - how could it be fitted with driving and steering motors for remote-controlled driving?
9 votes
5 answers
5k views

Please help identify this vintage (but non-Lego) brick!

It's time to play the "what brick is this" game, and this time our contestant is definitely non-Lego, yet vintage. This brick was in a small lot of early-60's Samsonite Lego bricks, and I am assuming ...
10 votes
1 answer
255 views

Different brand, slightly bigger than Lego

I have a set of Technic bricks used by an academy for teaching robotics to children. They are not compatible with Lego (I think that the pitch is 9mm instead of the 8.6mm of the original Lego design). ...
19 votes
2 answers
6k views

Is this part real LEGO or a knockoff?

I bought a LEGO lot off Craigslist a few days ago with some sets and some bulk parts. It included some parts that appeared to have been bought in bulk (maybe pick-a-brick?). It also had some random ...
2 votes
1 answer
85 views

Parts similar to 2x4 hinge plate

I can't find a similar Lego piece. It should be like in the photo, only solid and thicker, I remember I had several of these yellow ones, but I lost them. https://www.ebay.pl/itm/372966718634
4 votes
1 answer
225 views

Identify this set: bag with black, grey and black parts & 6-pointed star

Hi I got a massive bag of Lego today. In it I found those bags 4, 5 and 6. Can anyone identify what set is coming from? The pic below is from pack 6
18 votes
4 answers
4k views

Are these bricks old LEGO/Duplo clones?

Can anyone identify these bricks, which I suspect are LEGO clones. They may be more than 30 years old. I bought them on ebay as Betta Bilda from LEGO/Duplo dealer. Some BB was included, but these are ...
11 votes
1 answer
1k views

Please help identify this 1980's, very odd, Non-Lego brick!

I have one more mystery brick to share, and it is a strange one. This brick is FIVE studs long, and the width is comparable to a regular 2x4 Lego brick. The inner tubes are also comparable, but ...
18 votes
1 answer
1k views

What LEGO clone brand are these with 4-peg studs?

I think this was a present in the mid-late 80s. Very sophisticated building blocks for top-view apartment-room design. They also had furniture and appliances. Can anyone tell me the brand etc?
6 votes
1 answer
490 views

Minifig head with orange glasses - Which set is it from?

I am trying to make a LEGO minifig self-portrait, and I found a head that looks similar enough. But I can't for the life of me figure out which set this is from. Do you know? https://www.bricklink....
3 votes
3 answers
980 views

Instructions or details for the buildings in Set 190

A wave of nostalgia has struck me this holiday weekend, and I have been doing some research on the kits in the big plastic tub in my closet. Among many others, I discovered that among my collection ...
1 vote
0 answers
35 views

How to fix LEGO Mindstorms error code 5003?

I was using the NXT programming app and tried to download the file to the NXT, but it showed "Error code 5003". What is this error and what could I do to resolve it?
2 votes
2 answers
274 views

What to build with generic set of pieces

I have a good stock of used lego pieces, and planning to acquire more. The problem is that I am not sure what to build with them! Is there a list of sets easy to build with basic pieces, without the ...
3 votes
2 answers
549 views

Is using the term "Legos" always wrong?

LEGO tries very hard to protect its brand name. There is a company policy to use the expression "Lego bricks" rather than "Legos." I am fortunate to live close to a Legoland and a LEGO retail store. ...
5 votes
0 answers
100 views

How do you take apart the 4.5V Right Switch Track with White Ties?

I have part x879cx1, and its centrepiece that moves back and forth is broken (the lever snapped off, and a bit of the track on its lefthand side). Luckily I bought a bulk lot which had a loose one of ...
1 vote
0 answers
154 views

Bags of assorted Lego from Legoland

A few years back I visited the store at Legoland in Billund. They had a huge bin with bags of Lego bricks. No bags seemed to be identical, but most of them had a big overlap in types of pieces. (But ...
1 vote
0 answers
109 views

Error of Control+ calibration test on CAT D11

I've just finished building set 42131 Cat D11 Bulldozer, but unfortunately I couldn't do the final calibration before driving it... I carried out the tests during construction and everything was OK. ...
3 votes
2 answers
279 views

Transparent 1x2 bricks with no clutch power

I recently picked up a bag of odd bricks from my local LEGO store, from the bins where they resell bricks they've bought by weight. Amongst them were a bunch of 1x2 transparent bricks with no middle ...
5 votes
1 answer
176 views

Attaching a laptop to a table

I want to give my minifigs a few laptops. Specifically, 62698 "minifigure utensil, laptop"s: I've seen laptops in sets and MOCs, but always either (a) closed, being held in a minifig hand ...
4 votes
3 answers
2k views

Why isn't the new LEGO CV joint available on Bricklink or Brickowl?

In the new 4x4 X-treme Off-Roader set 42099 there are 2 new, sturdier CV joint pieces that I would like to have. If I search for 42099 on Bricklink I don't see a list of pieces included in the set. I ...
11 votes
7 answers
8k views

How to disassemble the propulsion wheels of the LEGO/DUPLO train engine base part# 28743 drivetrain?

I have a push and go motor, also known as Hub No5 model also known as engine base part #28743 The issue I have is that the train can not climb the bridge anymore, unless using the locomotive alone ...
38 votes
3 answers
11k views

What is inside the "weight element" brick?

I own a few bricks that contain a weight inside of them. 52g according to Lego. What exactly is inside of these bricks that makes them heavy?
6 votes
1 answer
212 views

Hinge parts between instruction steps in Studio 2

LEGO instructions sometimes hinge out bricks between two steps, as shown in this example taken from an instruction randomly: Step 25: Step 26: Is it possible to do something similar in Studio 2?
4 votes
0 answers
77 views

Do rollercoaster wheels clip into any part other than the rollercoaster base? [duplicate]

Normally the rollercoater wheels (part 24869) clip into the dedicated rollercoaster base (part 26021). Does anyone know of any other parts these wheels will clip into and rotate as smoothly? Part ...
8 votes
3 answers
1k views

Colouring bricks with the sun

This question is related to How do I change the color of a brick? and the exact opposite of How to minimise or remove sun-stains/fading from blocks? Is it feasible to artificially age bricks in ...
0 votes
0 answers
75 views

I lost a Lego piece and sticker [duplicate]

I lost my Lamborghini Countach brick and sticker. The sticker is number 2 and the brick is a white flat 1x4.
0 votes
1 answer
166 views

Infrared Sensor Activation Problems

I tried running my EV3 program that requires an infrared sensor, but it didn't work. I looked at the port view on the app and I saw the infrared sensor. It was connected, the brick recognized it but ...

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