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Crowbits’ Programmable Magnetic Blocks STEM Kit Review: Build, Code and Play

Compatible with Arduino UNO, Micro:bit, and soon Raspberry Pi, too.

(Image: © Elecrow)

Our Verdict

Crowbits’ progressive STEM kits teach future engineers (ages 6-10 and up) the basics of electronics and programming, but nondurable paper elements and poorly translated documentation could lead to frustration and incomplete projects.


  • + 80+ Lego-compatible electronic modules and sensors
  • + Helpful programming software
  • + Progressive learning kits
  • + Examples are very helpful
  • + Engaging projects for pre-teen and teen engineers


  • - Inadequate and inaccurate project tutorial
  • - Cable modules are stiff and pop off easily
  • - Cardboard projects are flimsy and cumbersome
  • - Labels are hard to read

They say that the best method of teaching is to start with the basics. This is true for most subjects, but even more so for getting kids involved and interested in learning about electronics and programming. This is exactly Elecrow Crowbits’ approach to launching young inventors and creators into the world of technology. 

Available via Kickstarter, the STEM kit series starts with building simple projects that make use of basic electronic concepts, then steps up kids' skills by introducing projects that require some coding and graduates to more advanced application development. The Crowbits lineup consists of five interactive STEM-based packages, each appropriately themed with projects that cater to kids from ages 6 -10 and up. These are the Hello Kit, Explorer Kit, Inventor Kit, Creator Kit and Master Kit.

With the variety of engineering kits out in the market today, Crowbits’ pricing falls in the mid-range category. Ranging from $26 to $90, depending on which kit you prefer, it is money well spent. One of the key values that Crowbits brings is its focus on teaching kids the basics of electronics through the use of these programmable blocks and sensors and ties that learning to current practical uses, like turning the lights on or off. This simple circuit logic is used to program small home appliances like coffee machines, automatic dispensers or even smart home security systems.

Much like the company’s previous Kickstarter project the CrowPi2, a Raspberry Pi-powered laptop which we reviewed last year, Crowbits also presented issues with documentation. Makers and creators know that clear and concise directions are very important for any project building. Unclear and inadequate instructions causes users, especially beginners, to feel that they may have done something wrong. They may be able to troubleshoot some issues themselves, but if left unresolved an air of defeat and frustration ensues.

 Crowbits Setup

 Setup for Crowbits starts with choosing which components to use depending on the project the child wants to try. The modules are designed to be plug-and-play so young makers can use them to build structures and experiment right away. Modules are also compatible with the entire series of learning kits, so if you purchased more than one, you can use them interchangeably. 

If you want to try building from the suggested projects, of which there are plenty to choose from, note that they become more challenging as you move up in the series and may include some coding and firmware downloads. 

How Crowbits Work 

Crowbits Modules

(Image credit: Elecrow)

Every kit consists of a number of modules. Each module has magnetic pogo-pins on all sides that help connect them easily. Another way of connecting modules are by the magnetic cables. At the back of each module are Lego holes for seamless integration of Lego bricks to any structure. 


(Image credit: Elecrow)

There are four different types of modules and are easily identified by color: Blue for power/logic, yellow for input, green for output and orange for special modules. It’s important to keep in mind a few rules for creating a circuit sequence. There should be at least a power, an input and an output module in order to build a circuit, with the proper sequence having the input block before the output. 

There could be multiple input and output blocks in a sequence where the output is controlled by the nearest input block. Lastly, names of modules must be facing up to ensure the correct pins are being used. 

 Crowbits Module and Sensor Breakdown 

Crowbits Module Breakdown

(Image credit: Elecrow)

There are four different types of modules and sensors for Crowbits and each function is distinguished by color:

  • Power Modules (Blue) – the power source and a core module that’s required for every project build. You’ll see a green light that indicates when the power is on. Use the included micro-USB cable to re-charge the power supply when needed.
  • Logic Modules (Blue) – for basic operations. Includes: 315 MHz Controller, Expansion, etc.
  • Input Modules (Yellow) – accepts input data like touch, vibration or object detection and passes it to the output modules. Includes: Touch module, IR reflective sensor, light sensor, etc.
  • Output Modules (Green) – receives command from input module and executes ending action. Examples are: Buzzer module (makes a sound), LED (Y) light up, or vibrate
  •  Special Modules (Orange) – used for advanced programming tasks. Examples are: I2C or UART 

 Crowbits Software and Hardware 

Crowbits Software

(Image credit: Elecrow)

Programming Languages Supported: Letscode (Elecrow’s visual programming software based on Scratch 3.0), which supports Python and Arduino IDE.

Open Source Hardware Compatibility: ESP32 TFT, Micro:bit board, Arduino UNO and Raspberry Pi (TBA).

OS Supported: Windows and Mac 

 Crowbits Learning Kits Use Cases 

 Hello Kit and Explorer Kit

Crowbit Hello Kit

(Image credit: Elecrow)

The Hello Kit and Explorer Kit are learning tools for beginners and targets children ages 6-8 and up. It introduces the concept of modules and their functionality. No coding is required for any of the suggested experiments and projects here. Building the projects with cardboard elements proved to be difficult for my seven-year-old and she got easily frustrated trying to use the thin double-sided tape that came with the kit. 

Once the structures were built (with my help) she did enjoy putting the modules together and making things happen like sounding the buzzer on the anti-touching device or making the lights turn on her window display project. Another annoyance to note was when using the cable module that serves to connect modules together. The cable is quite thick and not flexible so it had the tendency to pop off and break the connection for multiple projects.

I would have to say that my daughter was most engaged with the Explorer Kit, perhaps because the projects had more integration with Lego blocks, and some projects were also very interactive like the Quadruped Robot and the Lift, which were her favorites. She enjoyed building the structures and seeing the creations come to life, especially when there was movement, sounds and lights.

Inventor Kit and Creator Kit

Crowbit Inventor Kit

(Image credit: Elecrow)

The Inventor Kit and Creator Kit are the intermediate learning tools of the Crowbits series and targets children ages 10 and up. The Inventor Kit includes more advanced projects that incorporate the Micro:bit board in the builds. This requires some coding and the use of Letcsode, Elecrow’s Scratch-based drag-and-drop visual programming software. 

The software seemed a bit buggy (mainly in steps like downloading custom code) and there were inaccuracies in the project documentation that led to a lot of troubleshooting on our part. Hopefully, by the time Crowbits is ready for release in June, these kinks will have been resolved. 

It is worth noting, though, that the list of projects suggested for the Inventor kit seem to be age-appropriate. My tween worked on the Horizontal Bar and the Ultrasonic Guitar projects. She thoroughly enjoyed the experience and had no issues following the diagrams in building the Lego structures. There was a little hiccup in using the software, as I mentioned earlier, where we were wanting for troubleshooting tips and more clear documentation.

Unfortunately, we were not able to try out the Creator Kit as it was not available when we received our evaluation samples. We may update this review when we receive the Kit after its June release.

Master Kit

Crowbit Master Kit

(Image credit: Elecrow)

The Master Kit definitely is the most challenging of the engineering kits in the Crowbits lineup, with the task of programming hardware and software to build real-life products like a mobile phone, a game console and a radar. I’ll set aside my comments for this kit as I was unsuccessful in trying to make the phone and console work due to a corrupted SD card. 

Additionally, we had intermittent issues while uploading firmware. It is unfortunate because I was looking forward to this kit the most, but perhaps I can re-visit the Master Kit and post an update at a later time.  

The one successful project build out of this kit, the radar, honestly left us scratching our heads.  The expected results were not seen as we tried a placing variety of objects in the vicinity of the rotating radar dish and none of them seemed to be detected. 

Crowbits Learning Kits Specs and Pricing 

Hello Kit7 Modules5 Cardboard Projects6+$26
Explorer Kit13 Modules12 Projects8+$70
Inventor Kit10 Modules12 Lego, graphic programming projects and Letscode introduction10+$80
Creator KitTBDTBD10+$90
Master KitTBDTBD10+$90

Crowbits Available Bundles and Special Pricing 

BundlesKits IncludedPricing
Bundle #1Explorer Kit, Creator Kit, Master Kit$239
Bundle #2Explorer Kit, Inventor Kit, Master Kit$249
Bundle #3Hello Kit, Explorer Kit, Inventor Creator Kit, Master Kit$354

Bottom Line 

Despite all its kinks, overall the Crowbits STEM Kit appears to be another great educational tool from Elecrow with the emphasis on educating kids on electrical engineering. Whether it be building simple circuit projects or coding more complex applications for use in everyday living, the Crowbits series provides a complete learning platform for kids ages 6-10 and up. 

With its average pricing and the flexibility to pick and choose which kit to purchase, it is an attractive choice for someone looking to buy an educational STEM kit for their child or loved one. Of course you can also buy the entire set as a bundle and enjoy helping your child build models and program as you go through the different stages of electronic learning from basic to advanced concepts. It’s also worth noting that the Letscode software program that comes with the packages is free and supports Python and Arduino programming which is a welcome added bonus.