Thymio Robots

Image by

A Swiss-made robot, Thymio robots work with drag and drop languages and text-based languages like JavaScript.

What makes a robot fun? What makes a robot educational? Fortunately these two questions share similar answers. It is fun to pick up a robot and immediately begin figuring out how to control it. It is educational to reach the limits of this type of exploration with a desire to learn how to make the robot do even more.

Thymio, a robot developed in Switzerland and popular throughout Europe, is easy to start up and extends from pre-programmed functions, to drag and drop programming, and all the way on up to JavaScript.

Out of the box, Thymio comes with five pre-programmed motion sensors, each mode represented by its own LED color combination. Press an arrow on top of Thymio to turn it red and it moves away from you, press another arrow to turn it green and Thymio follows you. At the edge of an elevated surface? Proximity sensors on the bottom of Thymio tell it to stop before tumbling down. In fact, Thymio has over 20 sensors including an accelerometer, thermometer, and a microphone.

Thymio Robot Details

After clicking the arrows on top of Thymio to discover its 5 pre-programmed modes, you are able to choose from several programming environments to work with on a computer. A good first step is to install Thymio’s free Aceba Studio programming environment. Aceba Studio gives us three programming options: a visual programming language, Blockly, and Aceba’s text-based language.

For the youngest programmers, the visual programming environment allows Thymio to be programmed with drag and drop picture blocks that are completely text-free. This is an event-driven paradigm with an emphasis on cause and effect.

For example, we can first place an image of the four arrows on top of Thymio on the screen and select one of them. Beside this block we can place a second block with sliders to control the red, green, and blue LEDs inside Thymio. By sliding red and blue left (off) and green right (on), we have programmed Thymio to turn green when we press the corresponding arrow on the actual robot.

The second programming option available within Aceba Studio is Blockly, a style of programming similar to MIT’s Scratch language; blocks of code can be dragged onto the screen with minimal reading and typing involved. This also is mainly an event-driven environment, but we get a greater variety of blocks to choose from, including loops and conditional logic.

As we drag these blocks into the programming environment we see the actual code appear on the side of the screen, allowing children to gradually learn bits of text-based programming. When ready, young programmers can skip the blocks and type their algorithms directly into the Aceba Studio programming environment.

In addition to the programming options that Aceba Studio provides, Thymio can be used with two other fun interfaces.

Asebascratch is a relatively new link between Aceba and Scratch. After installing Scratch 2, Adobe Air, and Scratch2-ThymioII, we can open Scratch and find a new group of blocks called More Blocks, specifically for controlling Thymio. This extension gives programmers a familiar way to interact with Thymio, in a language that leads more directly to text-based programming.

A third, relatively new and powerful, interface has been created to program Thymio online. The site is RobotMagic (, and runs Blockly in the cloud. Although Aceba Studio allows us to program Thymio with Blockly, in RobotMagic we have a more traditional selection of blocks, allowing us to program using a more standard programming paradigm.

Scratch2 with More Blocks

To use RobotMagic, we can create a free account, click on My Dashboard, Technology, Thymio Robot, and finally select a world. For starters, try deleting the code that comes with that world. Replace it with one or two simple blocks, such as Move and Turn (both found toward the bottom of the Robot menu). Now choose a number of centimeters for Thymio to move and an angle to turn. Click Run to see the Thymio simulator follow your code. If it works, connect the Thymio robot to your computer and click Run Device. If you have already installed Aceba Studio onto your computer, your Thymio will likely follow the Blockly code, and can run when disconnected from the computer as well.

Like Acebascratch, RobotMagic is still a new product and might take some fiddling with before your robot actually runs from the programming interface. However, once it is setup correctly, RobotMagic extends the power of learning to program with Thymio.

One of the most unique features of the RobotMagic site is the Edit Code button. This allows us to view and edit the Blockly code in the language of the internet (and many other devices), JavaScript. From here, we can gradually begin controlling Thymio with the language used by perhaps the largest number of software developers in the world.

Finally, for those with a knack for building, Thymio is Lego compatible. Lego legs can be added to Thymio’s wheels, and blocks can connect to the top of Thymio as well. WIth a bit of work, you can customize Thymio’s hardware with Legos and its software with code.

Interested in trying out a Thymio? The robot can be purchased from, in which case your thymio will be shipped from Switzerland. For a slight increase in cost, Thymio is available from a US distributer, TechyKids. For about $200 Thymio will arrive at your house within a week. Take it out of the box and let the fun begin!

Learn More


Programming Thymio with Aceba


Thymio Programming using Blockly in Aceba Studio–kKrjyPM


Connect RobotMagic to Thymio

Thymio with Scratch



  • Jennifer Newell

    Jennifer is a math teacher by training, with an interest in computer science. While working on a computational thinking project at Google, she dived a bit deeper into CS education. Jennifer now teaches computer science to both high school and elementary school students, in addition to mathematics.

Also In The June 2016 Issue

Tinkercad makes it easy to create and print 3D objects from your designs and designs others create.

Figuring out how to find prime numbers is a matter of the right strategy plus code plus trying different ideas.

There are many ways to learn technology while playing. Here are technologies and resources you might want to find online this summer.

A super portable version of Makey Makey, there's lots of experiments you can do with the new Makey Makey Go!

A computational fairytale updated for the computer age, a grasshopper learns algorithms and planning ahead.

A book about the daily life of many different programmers who do neat things with code.

The US Congressional App Challenge is an annual contest to encourage US high school students to try programming by creating an app.

Younger kids can have lots of fun playing games this summer while learning basic programming concepts.

Minecraft is a fun game to explore with a vast set of worlds, animals, and adventures. Here are ideas to continue the adventure, online and offline.

Battery history is a critical part of the history of technology. Without stored electricity, there would be no electronics.

Links from the bottom of all the June 2016 articles, collected in one place for you to print, share, or bookmark.

Interesting stories about computer science, software programming, and technology for June 2016.

A Swiss-made robot, Thymio robots work with drag and drop languages and text-based languages like JavaScript.

Interested but not ready to subscribe? Sign-up for our free monthly email newsletter with curated site content and a new issue email announcement that we send every two months.

No, thanks!