Building blocks for adults: the most exciting alternatives to Lego

Kim Muntinga

31/3/2026

Translation: Natalie McKay

Support: Stephan Lamprecht

Lego dominates the building block market, but not everything exciting comes from Denmark. We’ve picked out six brands that appeal to adults in different ways. Sometimes this means technology, sometimes light, and sometimes themes that Lego doesn’t cover at all, or only touches on briefly.

For many people, building blocks are still pretty much synonymous with Lego. For decades, these colourful bricks from Denmark have shaped the way we think about building blocks. But if you believe that’s all there is to it, you’re missing out on a whole lot,

because the market has long since become more varied. Especially for adults, there are now manufacturers who are catering to niche markets, focusing on specific technical features, or designing models that belong more in a display case than in a kid’s room. It was precisely this variety that drew Stephan and me back in after years of staying away from building blocks. We’ll each showcase three of our favourites (Kim: Bluebrixx, Lumibricks and Mould King; Stephan: Cada, Cobi and Mattel Brick Shop).

Bluebrixx: architects of infinite themed worlds

Anyone encountering Bluebrixx for the first time will be initially overwhelmed – and then thrilled. This German brand’s product range includes hundreds of models that can’t be found anywhere else: «Stargates», train stations from the steam locomotive era, detailed (war)ships and medieval cityscapes that can be assembled into complete dioramas.

The product range is vast, yet surprisingly varied. Architecture, maritime history, science fiction, military technology, railways: Bluebrixx always fills niches that would often be too specific or too complex for the mass market.

The railway world’s particularly striking with its locomotives, railcars, platforms and signal boxes. Everything’s coordinated and, most importantly, extendable. The medieval architecture line works in a similar way, with individual sets designed to be combined into complete cityscapes or castle complexes. System capability isn’t a promise, but a design principle.

The brand comprises three lines, each designed for different needs and levels of experience. Bluebrixx Play is aimed at beginners: the sets are accessible, straightforward and not overly complex, while Bluebrixx Special is dedicated to unusual themes and niche topics. This is where you’ll find «Stargate», as well as maritime dioramas and rare vehicles. And, finally, Bluebrixx Pro is the line for anyone who prioritises detail and complexity.

What makes the building experience with Bluebrixx so special has a lot to do with where the models come from. Many of them were created by fans in the community. Bluebrixx not only develops its own products but also selects specific designs from outside sources to include in its product range. This has a direct impact on the construction process: techniques are used that are rarely found in traditional sets.

Blocks are arranged at unusual angles, and structures emerge from combinations that seem illogical at first glance and only make sense when viewed as a whole. Although the digital instructions – standard at Bluebrixx – follow the usual step-by-step approach, some of them are challenging and require prior experience. That’s exactly what makes Bluebrixx exciting, but not always beginner-friendly: depending on the set, the construction and instructions are far more challenging than with Lego.

Once the last block has been put into place, the model’s no longer a plaything but a display piece. There are often so many minute details that the line between this and traditional model building becomes blurred.

Cada: focus on technology

When it comes to technical models, Stephan thinks that Cada – a relatively recent addition to the building block scene – is one of the most exciting Lego alternatives. This brand consistently focuses on functionality: its lineup centres around technically sophisticated models, many of which are motorised and can be controlled remotely. Fully functional transmissions, steerable axles and realistic vehicle mechanisms are part of the brand promise. Licences from automotive brands like Lamborghini, Mercedes-Benz and Land Rover underscore the brand’s commitment to recreating the originals with meticulous attention to detail. The military product line is incredibly extensive: tanks, military vehicles and replica weapons are popular with fans, but are met with scepticism by parents and toy retailers, somewhat limiting their availability in stores.

A standout feature is the Master Series, launched in 2020. Like Bluebrixx, Cada acquires licences for designs created by independent hobbyist designers and brings them to market as ready-to-build sets. This is a way of showing appreciation towards the community, and it strengthens the connection to the brand.

In terms of quality, Cada has come a long way in recent years. Older sets were more prone to issues with the connecting pieces. But newer models generally receive positive reviews in forums and test reports: the bricks fit more securely and snap together better.

The company’s recommended retail prices are generally lower than Lego’s.

Cobi: military history preserved in building block models

No list of Lego alternatives is complete without Polish manufacturer Cobi. This company has been manufacturing compatible building blocks since back in 1992. Cobi’s a brand with a distinctive style. If you’re into military history, historic vehicles or striking display models, you’ll find items here that other manufacturers rarely offer.

Not everyone’s cup of tea: Cobi’s bricks generally have a higher clamping force, making display models more stable and better to play with. But this comes back to haunt you when you have to take your creation apart again.

The selection of military models is particularly extensive. The Historical Collection features scale models from the world wars, including tanks, ships and aircraft. Alongside the military models, there’s a Youngtimer Collection featuring classic cars, as well as series for children, including Action Town and Super Wings. In recent years, Cobi has secured several interesting licences, including Boeing, Lockheed Martin, Maserati and Opel.

The fact that the brand initially avoided all stickers was one of the reasons it was so popular among building block fans. Cobi applies the necessary details directly to the blocks using pad printing. The brand was so proud of this that it added the statement «Pad Printed – No Stickers» to the boxes. So this makes it all the more surprising that stickers have been reintroduced for some of the new products since the end of 2025. It remains unclear whether this is due to issues with the print alignment and is therefore an exceptional case, or whether the company’s changing course.

Lumibricks: light as an integral part

Lumibricks (formerly Funwhole) has been developing building blocks with built-in lighting from the very beginning. Kits and accessory systems are designed to highlight models through lighting effects and enhance their presence in rooms. The first thing that anyone building a Lumibricks set thinks about is how it should light up when it’s finished.

That might sound like a niche market, but it’s actually exactly what a lot of fans are looking for: the issue with many building block models displayed on shelves is that they look great during the day but disappear into darkness at night. Light solves this problem.

The fact that Lumibricks applies this approach across a wide range of themes – from steampunk scenes to medieval architecture and urban models – shows just how diverse the brand has become. This design philosophy’s underlined by the use of Gobricks parts, regarded within the community as being particularly precise, colour-fast and high-quality. And there’s more – Lumibricks mostly avoids using stickers and instead opts for printed bricks, which makes them more aesthetically appealing and give the set a premium look.

At first glance, the construction process appears to be divided into two parts, but in practice it flows seamlessly. The model is built step-by-step following the instructions, with the lighting being integrated during this assembly process. Wires are laid, LEDs are positioned and the power supply is planned out even before the model is complete. It’s precisely this interlinked process that makes it so appealing – but it’s more challenging than it sounds. Anyone doing this for the first time will learn just how much the position, colour and intensity of light can alter the impression a model gives.

The result no longer seems like a model in the traditional sense, but rather like a real object. Its bright glow is certainly eye-catching. I suggest you place it on a shelf, a table, or in a display case – a remarkable piece like this rarely goes unnoticed.

Mattel Brick Shop: a play system of cars and vehicles

Mattel Brick Shop’s the newest brand in our lineup. With Hot Wheels, metal parts and clearly defined vehicle models, it’s breathing new life into a segment previously dominated by Lego and smaller speciality companies.

Mattel’s one of the world’s best-known toy brands, and entered the building block segment in 2025. The company launched the Mattel Brick Shop brand at the Nuremberg Toy Fair in January 2025.

Contrary to what many people assume, the building block business isn’t entirely uncharted territory for Mattel. With Mega Construx (formerly Mega Bloks), the company already owns an established building block brand.

The first models were launched in the summer of 2025, and were developed in collaboration with the company’s iconic brand, Hot Wheels. Seven construction sets were released in three series, each with a different scale, number of pieces and also price tag. The Speed Series features compact 1:32-scale models of classic Hot Wheels cars, including a Maserati MC20 and the Custom ’68 Camaro.

Thanks to its 1:16 scale, the Elite Series offers greater detail and is made up of around 900 parts. You can choose between a ’90 Acura NSX (available as either a Honda or an Acura) and a Corvette Grand Sport.

The flagship is the Premium Series, which includes the Mercedes-Benz 300 SL on a 1:12 scale. It consists of about 1,600 parts and boasts many impressive details, such as working steering, doors that open and a lever to release the bonnet.

Something that all the sets have in common is that they feature genuine metal parts, such as hubcaps, nameplates and emblems. Each set also includes an exclusive 1:64-scale Hot Wheels die-cast model – a detail that makes these pieces appealing to the Hot Wheels community as well.

Mattel has already announced further partnerships for 2026, with Lamborghini, Aston Martin and Toyota set to join the vehicle lineup. The initial response from the community has been positive. More than anything else, enthusiasts praise the customisation options and the fun factor these bring. Mattel has already made a positive contribution to the market in just a short time.

Mould King: bringing heavy industry to the building block market

Mould King is the engineer of the industry. The brand’s known for its massive technical models, among the most complex and mechanically sophisticated sets on the market. Their cranes, excavators, heavy-duty vehicles, locomotives and supercars are less like toys and more like mechanical systems, often featuring dozens of gears, complex gear ratios, multiple steering systems and powerful motors.

Mould King has a knack for creating functional machines out of building blocks. Many models feature multiple motors, servo controls, pneumatic systems, smartphone-based RC control, comprehensive hydraulic simulations (in modular form) and detailed internal mechanisms such as multi-speed transmissions and working winches. The pieces are complex, time-consuming and challenging to build, as you’d expect. Mould King models aren’t something you can just pick up on a whim. Many sets require not only time and space, but also a certain tolerance for frustration.

At the same time, they’re a paradise for the modding community: more powerful motors, alternative batteries, 3D-printed components and new control systems. Hardly any other brand encourages further experimentation quite like this one.

Mould King demonstrates just how far the medium has developed from its original gameplay concept. This is all about engineering, machine construction and technical understanding in the form of building blocks. The brick becomes a technology.

More than just Lego – and what that means

A look at Lego alternatives reveals one thing above all else. Today, building blocks have become a genre in their own right. They’re exciting when they do something different. Some focus on technology, others on light, historical themes, or vehicles with collector’s appeal. This is proof of how varied building blocks for adults can be today.

For us, it was a way to get back into a hobby we had lost sight of for a long time. If you give it a go, you’ll soon realise that there’s more than one way to get into building blocks.

And that you don’t always have to go for Lego.

Which brands or sets have inspired you to start building again recently? Do you create models mainly to display them, for the process of assembling them, or just for fun? Let us know in the comments.

Kim Muntinga

Editor

Kim.Muntinga@galaxus.de

My interests are varied, I just like to enjoy life. Always on the lookout for news about darts, gaming, films and series.

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