Check out a really fun moving project that makes a Lego-constructed elevator go up and down, propelled by your trusty Arduino microcontroller.

This elevator project is a good way to re-use an old printer axis (if you’ve been wondering what to do with it), and it’s a low-budget, straightforward project. Despite that, it has a ton of “wow” factor, and it’s a fun way to introduce kids and teens to Arduino and Lego projects, too.

• Who designed it: Ingo Lohs
• Core components: Arduino Uno, IR sensor (2-10 cm), jumper wires, motor shield, printer/scanner axis
• Difficulty: All levels
• Where to find it: Arduino Project Hub

If you’re looking for a rewarding and fun challenge that combines Arduino, Lego, 3D printing, and tool assembly, this project is the perfect fit. This amazing zipline robot zips back and forth with the help of your microcontroller board.

A super-detailed tutorial will give you all the information and materials you need to complete this zipline, and you’ll need access to a 3D printer to make some of the parts.

• Who designed it: Tart Robotics
• Core components: Arduino Nano, battery connector, gear motor, 3D printed Lego coupling, machine screws, motor driver, microphone module
• Difficulty: Advanced
• Where to find it: Tart Robotics, Arduino Project Hub, Hackster.io

Prepare yourself to make an ultra-cool flying drone using Lego parts and Arduino programming! Flybrix sells kits that include all the parts and detailed instructions to create your own.

These drones can be controlled by a flight control app compatible with Google, Apple, and Amazon devices, and there’s code available to set up a Chrome app. The kits are currently sold out, but all the parts can still be bought separately. All the code is hackable in the Arduino IDE and is available on GitHub, so you could also build your own from scratch!

• Who designed it: Flybrix
• Core components: Motors, motor arms, propellers, flight controller, rechargeable batteries
• Difficulty: Advanced
• Where to find it: Flybrix, GitHub

This is a fun project for fans of Arduino and Lego trains (a pretty awesome combination, we must say). The decoupler automatically separates your Lego trains on a split track, which is both fun to watch and also makes it easier to send trains in two different directions for complex model train networks. The tutorial is thorough, clear, and very visual.

If you like this project, the YouTube channel is devoted to other Lego train projects using Arduino, and there’s a wealth of ideas to explore.

• Who designed it: Arduino Lego Trains
• Core components: Arduino board, motor, IR sensors, 9-V Lego train sets
• Difficulty: Intermediate/advanced
• Where to find it: YouTube

This highly unusual project is quite creative in its scope: it’s a breathalyzer using both Lego and Arduino, as well as the Arduino-based ANAVI gas detector. While it shouldn’t be considered a substitute for medical devices, it can be interesting to test out in your home.

The project has a thorough tutorial with photos as well as a video for instructional purposes. It’s also fully documented on GitHub.

• Who designed it: leon-anavi
• Core components: ANAVI gas detector, cables, OLED display
• Difficulty: Intermediate/advanced
• Where to find it: Instructables

If you’re looking for a creative yet straightforward Arduino-Lego project, you may want to try and make this simple fun LCD clock project that looks great with Lego decor on top!

It features clear instructions, and it’s a good way for beginners to the Lego and Arduino worlds to start combining the two ecosystems together.

• Who designed it: Tishin
• Core components: Arduino Nano, real-time clock, LCD display, breadboard, jumper wires
• Difficulty: All levels
• Where to find it: Arduino Project Hub

Impress your friends when you make a really special Lego lighthouse that lights up with automation, thanks to the help of an Arduino board and LED lights.

The project features exceptionally well-written instructions, and lists all needed materials. It’s especially great because of its creativity and Lego building work, and the details can be easily customized.

• Who designed it: yoda333
• Core components: Arduino Uno, small mirror, switch, diode, NPN transistor, photocell, DC motor, LED, breadboard, resistors, wire, electrical tape
• Difficulty: Advanced
• Where to find it: Instructables

Here’s a clever design for a temperature and humidity sensor project, to help you out with monitoring your surroundings. It’s ideal especially for house plants or anything around the house that shouldn’t get too much moisture (or that needs more).

A great budget project as it uses very few materials, it’s also an excellent choice for beginners as it’s not terribly complex.

• Who designed it: YENFU CHEN
• Core components: Arduino Uno, LCD display, temperature and humidity sensor
• Difficulty: Advanced beginner
• Where to find it: Hackster.io

You can’t help but smile at this cute quadruped robot that’s powered by Arduino and uses 3D-printed Lego-compatible parts. Using an ultrasonic sensor, the adorable robot explores its surroundings and can avoid obstacles while investigating a variety of surfaces.

With clear instructions and schematics, it’s a fun family or school project to consider as well. Just note that you’ll need access to a 3D printer to print some of the project’s parts.

• Who designed it: Tart Robotics
• Core components: Arduino Nano, HC-SR04 ultrasonic sensor, transistor, breadboards DC power jack, gear motor, 3D printed Lego coupling
• Difficulty: Intermediate
• Where to find it: Tart Robotics, Arduino Project Hub, Hackster.io