All Questions

Is the documentation (either official or unofficial) of the programming "language" for the LEGO Mindstorms Robot Inventor software available somewhere? Preferably online, without requiring ...

I am making a Python program with the LEGO Robot Inventor software which will, among other things, turn the robot a random amount periodically, which of course requires a random number. However, I ...

This is a windshield piece 2x 4 x 2, 4594. It has a printed green face on it. What set does it come from?

Where can I get the instructions (PDF) for Lego 10261*3 MOC (the big roller caster). I saw this on Youtube, but I don't have Paypal... Just wondering if anyone can provide a copy of that instruction, ...

Can anyone identify this hair piece and head? I did a search for moustache on Bricklink and couldn't find it.

I wonder whether a piece exists fitting any of the following (equivalent) descriptions: As a 1x2 jumper (two-studs-to-one-stud-jumper) or a 1x3 jumper (three-studs-to-two-studs-jumper), but without ...

I have some Lego bags that I do not know which set they belong to. Can you guys help me?

I downloaded the LDD version 4.3.11 and it shows me the following message can anyone help me? Thank you, Ariel

My son has this bag of unopened lego with no instructions. Bag has numbers 135149 and says 2011. Colours are mostly brown and white. There are eye pieces included both open and closed with eyelashes.

In order to power the Creator Expert Roller Coaster (10261) can the 'Power Up' components Technic XL Motor (88014) and Technic Hub (88012) be substituted for 'Power Functions' components M Motor (8883)...

I have had these windows in my LEGO collection since the 80's and my mum bought them second hand. They look and feel like Lego but don't have the word LEGO stamped inside the hollow circles on top.

These were in a set but I cannot for the life of me find them despite many searches online and on Bricklink... Any help much appreciated.

Just received the item 51515 Managed to connect the Mindstorms controller via Bluetooth from mobile without any problems. Great! Next step, connect from PC. When I connect from my Windows machine I ...

I am trying to make a program that requires my 51515 to turn a specified number of degrees. I found a way to do that on the LEGO app's "Knowledge Base", but the given example was: import ...

What set is this from, or what is the piece number?

I’d like to use a signal from a (5V) littleBits circuit to control some (9V) Power Functions motors. Does LEGO sell or recommend a DC relay to facilitate this sort of thing? If the answer is no, I’d ...

I want to create some custom LEGO Technic pieces, but I can't seem to find any software that is good at making it. I have tried using Blender, but it is hard to create holes. Do you have any ...

I've seen a few Mindstorms "infrared transmission towers" listed on Brick Owl, Bricklink and other sites. However, I cannot find any good documentation that how they work, how they are used ...

I am currently in the middle of my long Dark Age and I am trying to identify the polybag that was sold separately in Poland around year 2003. It had a number, airholes, LEGO logo and yellow accents, ...

If a gear was intended to smoothly mesh with standard LEGO gears, how should it be defined? While I know that the mean diameter (average of inner and outer diameters) of a LEGO gear should be 1mm/...

I recently bought a set from Bricklink, and noticed while building that a couple of pieces had a slightly different logo placement and size. The larger logo matched all my other bricks, but the ...

The answers to this question don't contain the (variable) assorted tolerance distances that are applied to all LEGO dimensions except for the peg spacing (which is the only measurement left out). Has ...

I am ordering parts for some MOC I found online. As I compare the parts needed against my inventory, I find that I already have some of them but under different part numbers. For example, I have part ...

I am back using Lego as an adult. On Youtube I saw a video of a quick build of the Colosseum, which connected the same standard parts with a connector to make it curved. I want to do something similar ...

I'm aware of the MILS standard for building large layouts including city and train elements: This could obviously be adapted for use in medieval layouts, but is there something like this that has ...

I wonder, who designed EV3RSTORM? I have searched on Google but no results.

After first book, crane won't roll if pushed. If this normal. I know when you free soon one wheel, the other will go opposite direction, but when I try to spin all four in one direction, it locks. It ...

Could someone please help me identify this part?

I am aware of how to create a Lego model and generate instructions using LDD and Stud.io However, I am having trouble figuring out how to do this for Duplo. How does one do this? EDIT: @alex yes I ...

I want to make an axe out of the axe head with snake There's a picture of how they did it here: I don't know how to look up the accessories on the minifig on the right with the axe. Can anyone ...

Hoping someone can help. I grew up in the 80s and LEGO was my life but one birthday my grandparents bought me a building set which included plastic panels that snap together. When all put together it ...

I am trying to use data logging functionality in EV3 LabView using Pixy2 camera, but I get this error when I click on download and run … Unable to compile some documents for deployment: Experiment....

Two bags from Goodwill, bags are marked 2017, number 135149 (which I’ve heard is not useful information anyway)... The QR code unfortunately would not work on the LEGO app.

I'm an adult but have come to fall back in love with LEGO again after building the LEGO Apollo Rocket kit. I wanted to buy a large set of just various LEGO bricks to build neat things. But what I am ...

I am trying to execute commands using the -X switch on the Spike Prime Hub but all I get is either nothing, or unknown command errors. Here is what I tried so far: screen /dev/ttyACM0 -X 'print("...

I'm trying to find the LEGO-like set I have so I can buy more and I want to make sure they are compatible. The box top says "max" and I have some of the instructions. You can build a castle, ...

There is this strange wheel-like part consisting of two pieces snapping into each other and offering to insert axles from both sides, as shown in the first image. What is the purpose of this part ...

I've just started playing with Lego Boost. Currently I only have very few programming blocks available in the Android app. According to this, I should be able to unlock all blocks by pressing the ...

I got a LEGO Mindstorms 51515, and I have finished building my 1st robot, and now would like to program it. However, I cannot find any companion program to use. Where can I install the companion ...

I gave my father a LEGO set to help with his dementia. He lost the box and directions. I don't know what the set is. It appears to be a car. There is a windshield and some wheels. It's mostly black ...

When i try to open lld it comes up with a message that it can't access the internet and you can do it in offline mode. Which is ok I guess. My only problem is that someone sent me building ...

I've made a really awesome robot with LEGO Mindstorms EV3 (and I'd like not to say what it is here). I've seen fan robots on the LEGO site, and I wonder whether they could add mine on the site. I've ...

I came across this brick while sorting some Lego I purchased. It's similar to an Electric, Light Bulb Cover (colored globe), but with three major differences. It is a bit wider, the lower lip is a bit ...

I tried new batteries, disassembled it, and greased it. The engine wheels seemed a bit sticky due to something sticky inside that got there at some point. I put some WD40 to make it work better and ...

Tiny orange truck with license plate "5T33R". Also has "Steer Well" sticker, flames on the sides. Have searched and can’t find online.

In former times, all Lego sets used to come with a small catalog. This was either just a single leaflet with an overview of several themes (with a focus on new sets or subthemes), found in smaller ...

I have a question about the lanterns in the Winter Village Toy Shop. I'd like to just buy the parts to make a few of the street-lights in that set. However, from reading the instructions (steps 4 and ...

I have an older 12V LEGO train (several actually) but of course the rubber tires wore out long ago. The trains still run quite well (I even used them as a motor parts in some Technic designs), but the ...

I cannot identify this LEGO set my grandma gave to me. I want to help her build it for my cousin, but my grandma did not have the instructions.

Does anyone know what minifigure this is?