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20 votes
Accepted

How to disassemble LEGO train engine base part# 28743?

Here are some disassembly pictures and tips. Tools needed: Either a precision flat-head or Philips screwdriver: There are two flat-head/Phillips hybrid screws that hold the the battery cover down. ...
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17 votes

Is there an API for the Duplo 10874 train set?

There is now official documentation for the Bluetooth protocol used by the Powered Up product line: https://github.com/LEGO/lego-ble-wireless-protocol-docs The community has created some tools to ...
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16 votes
Accepted

Will Duplo trains fit onto a regular 6 stud LEGO track?

For this experiment we're using the wheeled Duplo push and go motor block and red cabin from Set #10874. The wheel width of the motor is the same width as a non motor base. So, for this train ...
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13 votes

What is LEGO Junior?

LEGO Juniors sets use normal LEGO System bricks. In other words, they are exactly the same size as the "normal" LEGO bricks. However, the Junior sets are specifically designed for younger children....
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13 votes
Accepted

What is the tiny-hand most-friendly sets to migrate from duplo to lego?

As a conservative approach I would suggest the LEGO Juniors series which has cars and other sets and that are easy to build. However, from first hand experience I can tell that kids learn quickly. ...
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13 votes
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Why are there always holes in Duplo bricks?

Plastic molds are designed to have an even thickness wherever possible (I think it helps with cooling), so a having a hole in the stud made sense to keep the brick's walls consistently thin. The hole ...
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11 votes
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Is this a real Duplo Train Base or fake?

These 10 are Duplo Vehicle Car Base 2 x 6 with Hitches and Red Wheels (Old)' (4883cx2) and came in Red, Blue and Yellow
  • 7,413
10 votes

Website with layout plans for LEGO Duplo trains?

I'm not aware of any sites that are dedicated to DUPLO train layouts, but there are certainly interesting layout ideas out there. For example, this was included in set 2932: There are also loads of ...
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9 votes

LEGO or DUPLO ringing doorbell

I think you mean this part: Duplo Brick 1 x 2 x 2 Rounded Top with Bell It comes with 3 different prints. There are several sellers on bricklink selling the part.
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9 votes
Accepted

What is the length of a DUPLO train bridge?

Based on the layouts from this answer, a half-bridge seems to be 2 straight tracks + 1 quarter-circle (split mid-track at the end, because the middle of the bridge is centered with the crossing track ...
9 votes

What is the function of Duplo part# 38507 RAIL ACCESSORY, NO. 4

It's an interactive piece that makes the train perform a cool(ish) function when it rolls over it. The train has a sensor on the bottom that reads the piece and does the deed. When the train reads ...
  • 8,748
8 votes

Are DUPLO blocks compatible with LEGO blocks in any way?

Some elements are compatible, others are not. IIRC You can stack regular 2x2, 2x4 etc lego bricks on top of normal duplo studs and they fit and hold fine. You can't cover only part of a stud, so ...
8 votes
Accepted

Is the Lego Duplo Track System being discontinued?

It hasn't been officially announced yet, but there are at least four large LEGO DUPLO train sets coming this summer. This includes two extension train track packs with straight tracks, curved tracks, ...
8 votes

Duplo block with facecloth or towel on

I have gone through 32 pages of 1x2x2 bricks, and there do not appear to be any towel bricks. (There are, however alternate soaps) The only sets that I can find with towels all use cloth ones
  • 1,214
7 votes

What are good DUPLO projects for around 2 year olds?

And here is my first project: Color towers: Building towers is probably the first directed building effort that toddlers undertake. In this project I gave our son (20m) many bricks and built 4x4 ...
7 votes
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What is this snapping brick for / which set is it from?

Looks like the Duplo Car Launcher and according to Bricklink this appears in at least 4 different sets: http://www.bricklink.com/catalogItemIn.asp?P=31080c01&in=S
7 votes

Is there an API for the Duplo 10874 train set?

Official docs: https://lego.github.io/lego-ble-wireless-protocol-docs/ https://github.com/LEGO/lego-ble-wireless-protocol-docs Discussion: https://www.eurobricks.com/forum/index.php?/forums/topic/...
  • 171
7 votes

Duplo Locomotive: What is this inner part used for?

They are protective locks. If something (let’s say kids hair, or part of their clothes) gets stuck and dragged inside the wheel, these tiny blocks will lock the wheels and make sure it doesn’t keep ...
  • 233
7 votes

Is this an early Duplo mini figure?

At last, I have your answer. The figure is from a "Giant Pre-School Loc Bloc" set, likely the "Playground" one shown in the picture. Nearly a month later, while doing unrelated research, I found "...
  • 3,214
7 votes
Accepted

What is the purpose of the discontinuity in the DUPLO train bridge rack?

I could imagine that this design was chosen to take care of slight angular missalignment of the tracks at the peak of the bridge (the two parts are not exactly in a straight line but slightly bent at ...
7 votes
Accepted

Will the Duplo train track extension set 10872 work with Duplo train set 2700?

From a train point of view those wheels will fit happily within the guides of the bridge, and the connections on the tracks should just about fit as well. I'm fairly sure we bought our bridge when we ...
7 votes
Accepted

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

My back wheels do the same thing. There is no metal axle that connects both back wheels like the axle design does for the front wheels, but I'm sure LEGO designed it that way. So, imagine the train'...
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6 votes

Are DUPLO blocks compatible with LEGO blocks in any way?

Duplo bricks manufactured post 2002 are also compatible with a larger brick, produced for a limited time, called Quatro- it is 4 times the size of standard system bricks in every dimension. Older 2x4 ...
6 votes

Software to do Duplo train track layout?

You can use RailModeller Express or RailModeller Pro on macOS. Both feature LEGO tracks (regular and Duplo): http://www.railmodeller.com/libraries.html
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6 votes
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What logos appear on Duplo brick studs?

There really isn't a "on" for the Duplo studs. All Duplo studs are hollow studs. In the interior of the stud, depending on set and the year of the piece, the stud will read: DUPLO or LEGO
  • 2,170
6 votes

Is this a real Duplo Train Base or fake?

A legitimate duplo train part will have the word Duplo imprinted inside each round stud, like you see in the image here, sorry for the fuzzy pic. -Brian from brickablocks.
6 votes

Is it possible to use DUPLO bricks in LDD?

LDD is a closed world where people can't add its own parts. If you want to create Duplo building instructions you should use LDraw that has many Duplo parts in its library, and allows you to create ...
  • 2,663
6 votes

Why did LEGO stop selling sets for <1.5 year old (Primo etc)?

I can't comment on why Lego stopped selling Primo. But I can assure you that Duplo is fine for children. The smallest pieces are way too large to choke on, as far as I can tell. Small babies probably ...
6 votes
Accepted

From what series is this brick? Duplo machine piece with yellow button, copyright 2007

This is a Duplo Sound Effects Brick 2 x 4 with Water and Pump Sounds (Set 5605) brick from 2008. It featured only in 1 set, 5605 Tanker Truck.
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