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Robot Blocks

Cubelets are a fast and easy way to inspire kids
to become better thinkers.

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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

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!

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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

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.

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.

17 Different Cubelets

Build with Bluetooth

Reprogram and remotely control your Cubelets.

Click the play button to learn more about the Bluetooth Cubelet.

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Mobile Apps

  •  Cubelets Control +

    Cubelets Control is a mobile app that connects to a Bluetooth Cubelet. It does two things: it can remote control up to six Cubelets, and it can also read their values. So you can communicate both ways with your Cubelets robot: read and write.

    App Store Android Market
  •  Cubelets Log +

    Log allows you to plot Cubelet values over time so you can visualize their behavior. Connect your Bluetooth Cubelet, then select up to six other Cubelets to log.

    App Store
  •  Cubelets Sketch +

    Use Sense Cubelets to draw sketches! Connect to your Bluetooth Cubelet, then select two Sense Cubelets: one to move the cursor left and right and the other to move up and down. Use two knobs to draw like an Etch-A-Sketch® or use distance sensors to draw by waving your hands!

    App Store
Start Your Collection With These Cubelets Essentials

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? +

  • 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.

  • How do I program Cubelets? +

  • 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).