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Grab the New Cubelets TWELVE Pack! Cubelets robot blocks are a fast and easy way to inspire kids to become better thinkers.


Initiate, Imagine, Inspire.

Inspire a love of learning through play. Cubelets are robot blocks that make it fast and easy to engage children as young as four in learning by building robots. There’s no wrong way to build with Cubelets, so it is remarkably easy to transform these blocks into brilliant bundles of robotic curiosity.

Ages 4+ / Free shipping in the USA
Making with Magnets.

You don’t need to know how to code or wire to construct robots with Cubelets. Snap the robot blocks together and the magnetic faces do the rest. Every unique arrangement is a new robot with novel behaviors emerging from the construction. Invention made easy.

While you don't need to know how to code to play, you can code Cubelets to exhibit new behaviors using C.

Come, See Cubelets

Cubelets are robot blocks that easily connect to form robots that

inspire kids to become better thinkers. Press play to learn more!

Buy Now
Building with Bricks.

Builders rejoice! Cubelets Brick Adapters let you pair with Lego® and other brick-based constructions to add new levels of detail and artistry to your robots. Brick Adapters come in two different styles, “studs” and “sockets” so you can build in any direction.

LEGO® is a trademark of the LEGO Group of companies which does not sponsor, authorize or endorse this site.
Branch Out With Bluetooth.

Ready to take your robots to the next level? Add a Bluetooth Cubelet to your construction to create responsive remote control robots or reprogram Cubelets to exhibit new behaviors.

Download the Cubelets App for iOS or Android to build with Bluetooth.

Cubelets OS 4

Modular Robotics has released a new operating system for Cubelets called OS 4. It changes the way Cubelets communicate with each other and with connected devices. Cubelets OS 4 enables Cubelets to do everything they do now, only better!

Learn More

Cubelet OS 4 is FREE. All you need to do is upgrade with a Bluetooth Cubelet using the new Cubelets app.

Get The NEW Cubelets Mobile App

  •  Cubelets App +

    The NEW Cubelets app is designed to work with Cubelets OS 4. Use it to upgrade your Cubelets to OS 4. Once you’re running OS 4 you can use the app to create remote control robots and read sensor data values. So you can communicate both ways with your Cubelets: read and write.

    App Store Google Play
Cubelets Twelve Kit

The Cubelets TWELVE kit contains these 12 Cubelets and is the best way to introduce robotics and programming to kids. Create thousands of thought-provoking robots that provide intuitions about the behavior of complex systems with Cubelets TWELVE!
  • Fast and easy!
  • No wrong way to build.
  • Proven to engage different types of learners.

$329.95 Buy Now

Ages 4+ / Free shipping in the USA

Control Cubelets with Bluetooth

Start Your Collection With These Cubelets Essentials
Control Cubelets with Bluetooth

17 Different Cubelets
Cubelets Six Kit

The Cubelets Six kit contains these 6 Cubelets and is the best way to inspire a love of learning through robotics. With the Cubelets Six, you can create simple mobile and reactive Cubelet robots that provide intuitions about the behavior of complex systems.

    • Easy for kids as young as four.
    • Get quick results!
    • Not intimidating.
    • No wrong way to build.
    • Proven to keep different types of learners engaged.
    • No coding or wiring required.

$159.95 Buy Now

Ages 4+ / Free shipping in the USA

Cubelets Twenty Kit
The Cubelets Twenty Kit has 20 blocks and contains an assortment of Sense, Action, and Think blocks. With it, you can experiment and create mobile robots and logic constructions.

  • Encourages self-directed learning.
  • Inspires a love of learning.
  • Builds confidence working in unfamiliar areas.
  • Encourages curiosity.
  • Integrates STEM with play.
  • Free and remixable lesson plans and curriculum.
  • Helps prepare kids to thrive in an increasingly complex world.


$499.95 Buy Now

Ages 4+ / Free shipping in the USA

Cubelets F.A.Q.

  • What ages are Cubelets appropriate for? +

    Cubelets are designed for kids age 4 and up. Adults often enjoy building with Cubelets as well.

  • Do you offer an educator's discount? +

    Sorry, we don't offer an educational discount or discounts to any groups.

  • How do I start? +

    Take a look at our Getting Started Guide.

  • Why isn't my robot driving? +

    Do you have a Battery Cubelet on your robot? Every robot needs a Battery Cubelet to supply power. Is the Battery Cubelet turned on?
    Do you have a Drive Cubelet? A robot needs wheels to drive.
    If your robot has Battery and Drive Cubelets and is just sitting there, perhaps it needs a Sense Cubelet to provide some stimulus. Maybe your robot will drive according to light levels, or maybe you'll design it with Distance Cubelets so that it can follow or avoid things.

  • Where are Cubelets made? +

    Cubelets are assembled in the USA from components that are made all over the world. Modular Robotics is located in Boulder, Colorado. Factories in China, Japan, and the USA manufacture various pieces of our robots then send them to us in Colorado, where we put them together, test, and ship them.

  • Are magnetic toys dangerous? +

    Eating or inhaling tiny magnets can be fatal. In 2006 and 2007, the Consumer Products Safety Commission ordered a recall of millions of Mega Brands' Magnetix kits, finding that the little magnets were improperly attached and could fall out.

    Modular Robotics is committed to making the safest magnetic toys ever produced, and we are working with the industry to set better guidelines for using magnets in toys and to improve testing criteria and oversight. The magnets inside of Cubelets are not just glued in, they are mechanically attached so that they cannot fall out. Cubelets contain magnets, batteries, and motors. They are only for children age 4 and up, and kids should always be supervised when playing with them.

  • Are your kits lead-free? +

    Our kits contain no lead and are independently tested by Intertek, a nationally recognized testing laboratory. Our kits are compliant with US CPSIA and ASTM standards.

  • What should I do if one of my Cubelets is broken? +

    Cubelets come with a one year warranty against design and manufacturing defects. If you have a broken Cubelet, send it back to us (you pay postage), we'll repair or replace it and send it back to you (we pay postage).