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Cubelets® Robot Blocks combine to build thousands of thought-provoking robots. They’re a fast and easy way to inspire kids, as young as four, to become better thinkers!

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Ages 4+ / Free shipping in the USA
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!

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

Cubelets and MOSS Kits

Meet MOSS, part robot construction system, part mind-boggling robo-tech from the future. These little building blocks of invention combine to create a universe of robot toys. Harness your inner inventor and see what you can build!

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Ages 8+ / Free shipping in the USA


Tiny Robots. Big Lessons.
Discover how you can inspire a love of learning in your students with these innovative, tiny robots.

Periodically Posed Queries

  • What is a robot? +

    Put simply robots are a machine that can sense, think and act. Building your own robot is a lot of fun! Plus, building robot toys provides play driven learning opportunities that explore design, engineering, and emergent behavior in complex systems.

  • Which Modular Robotics system is right for me? +

    Cubelets are designed for children 4 and up, and adults love them too. Cubelets are remarkably simple to play with and a great starting point for budding robot enthusiasts. MOSS is designed for children 8 and up, and yes, adults love them too! MOSS provides a slightly more challenging build experience and incorporates elements of kinematic design. Be sure to check out the page MOSS and Cubelets pages for more information.

  • I don't know how to program, can I still play? +

    Yes indeed! MOSS and Cubelets don't require programming to build and play. But if you'd like to expand your play experience and reprogram your robots to behavior differently, you can use one of our free programming environments!

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Robots we make in the USA

We proudly assemble these little robot toys in Boulder CO, using parts from all over the world.

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