Curiosity Set.

Build, learn, and create more with the Cubelets Curiosity Set. Open a box of little robot blocks that will intrigue, fascinate, and inspire builders for hours on end. You’ve never seen building blocks like these. Cubelets make it easier than ever to explore robotics, coding, and other big ideas.



⚠️  Item out of stock.

Cubelets Curiosity Sets are BACK IN STOCK. We have a limited number available and once we run out, we'll be out of stock again for the foreseeable future. If Discovery or Curiosity are on your Gift List, be sure to snag yours right now!
Cubelets Curiosity Set

Building blocks for better thinking.

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Award-winning play that inspires the mind.

The Curiosity Set is the winner of the Learning® Magazine 2020 Teachers’ Choice℠ Award for the Classroom.

Little robots, big lessons.

Foster vital thinking skills in the classroom or the living room. Fascinating and fun, Cubelets nurture your child’s imagination, creativity, and inventive spirit. Cubelets are the building blocks of better thinkers.

Loved by educators from Vermont to Vietnam.

Cubelets are a great introduction to computational thinking. Computational thinking is a fancy term for the way computer scientists solve problems. It helps break down complex problems, and find repeatable solutions. Computational Thinking is just one of the many skills that educators love to teach with Cubelets.

Block by block, robot by robot, Cubelets help develop vital skills.

Ages 4+

Ages 7+

Ages 10+

How Cubelets work.

Just like building blocks only smarter.

Cubelets make the principles of programming easy to learn and practice. Inside of each block is a part of a program – as you build your robot you build the code that controls its behavior. It’s hands-on coding!

Build loads of simple robot constructions with the Cubelets Curiosity Set. Visit the robot ideas page for tutorials, samples, robots, and more!


Each Cubelet has a special function and belongs to one of three categories: SENSE Cubelets take in information from the robot’s environment. THINK Cubelets compute and change that information, and ACT Cubelets turn that information into physical action.

Connect at least one SENSE, THINK, and ACT Cubelet to create a robot construction.

There are three kinds of Cubelets - Sense Cubelets are black. Think Cubelets are a variety of colors - and Act Cubelets are transperant.

Connect to construct.

Cubelets’ magnetic faces make them simple to snap together and pull apart. Each Cubelet has a special function. What you connect, and how you connect them changes the behavior of your robot constructions. Every combination is a new creation.


Pair blocks with bricks.

The yellow Brick Adapters connect to LEGO® and other brick building- block toys. Discovery Set includes one “studs” and one “sockets” adapter so you can build in any direction.

*LEGO does not support nor endorse this product. 

Pair blocks with apps.

The Bluetooth® Hat pairs robot constructions with free Cubelets apps. The simple, proximity-based pairing makes connecting easy. Cap your creations with the Bluetooth® Hat to add new abilities, read robot data values, and code new behaviors in Blockly or C.

Data Logger.

Learn how Cubelets “talk” by visualizing block values or save the data for analysis.

Personality Swap.

Discover how swapping a Cubelet’s Personality changes the way it behaves.

Blockly Coding.

Build new Cubelet behaviors with drag-and-drop programming.

C Coding.

Build new Cubelets programs with text-based coding.

Learn more about Cubelets Console.

Cubelets Curiosity details.

Battery Cubelet

Battery Cubelet (x1)

Provide the energy needed to power robot constructions.

Brightness Cubelet

Brightness Cubelet (x1)

Enable a construction to detect and respond to light.

Drive Cubelet

Drive Cubelet (x2)

Build robot constructions that navigate their world.

Distance Cubelet

Distance Cubelet (x2)

Enable a construction to detect and respond to nearby objects.

Flashlight Cubelet

Flashlight Cubelet (x1)

Create constructions that shine a dimmable LED light.

Inverse Cubelet

Inverse Cubelet (x1)

Flip data values, making low values high and vice versa.

Passive Cubelet

Passive Cubelet (x1)

Build bigger robots, without modifying data values.

Rotate Cubelet

Rotate Cubelet (x1)

Create constructions that whirl and twirl.

Bluetooth Hat

Bluetooth Hat (x1)

Pair robot constructions with free companion apps like Cubelets Console or the Cubelets mobile app.

Brick Adapters (x1)

Add style and expand building capabilities with LEGO® or other brick building toys. Includes one "stud" and one "socket" adapter.

Curiosity Guide (x1)

A helpful printed Curiosity Guide and downloadable Parents’ Play Guide.

Micro-USB Charging Cable (x1)

Recharge your Battery Cubelet to power your robot constructions for hours on end.


Recommended ages.

Cubelets are recommended for builders ages 4 and up. Cubelets are intuitive enough for preschoolers to start building robots, but they scale in complexity, teaching new skills as kids grow. Cubelets are even loved and used in university computer science programs!

Battery information.

The key to every Cubelets construction is the Battery Cubelet. A fully charged Battery Cubelet can power up to 6 hours of playtime. Recharge the Battery using the included Micro-USB cable. When fully charged, the amber light on the Battery Cubelet will turn off.


Brick Adapters measure 32mm long x 32mm wide x 10 mm tall

Other great stuff.

Comprehensive one-year warranty.

Cubelets are tough. But just in case you need it we're here.

Orders $50+ get free US shipping.

Applies to US domestic orders only.

Other Cubelets products you might enjoy.


Need help?

Got questions about Cubelets? We’re here to help. Send us a message to get started.

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Cubelets Curiosity Set - box and robot blocks

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Cubelets Curiosity Set

⚠️  Item out of stock.


Frequently asked questions.

Cubelets FAQs is your place to find answers to common questions about Cubelets robot blocks, orders, and Modular Robotics.

Contact us.

Need help, can't find an answer? Contact the Modular Robotics support team and we'll help you!

Shipping and tax policies.

Get the details on Modular Robotics shipping policies and sales tax collection for orders in the United States and around the world.

Warranty and returns.

Cubelets are backed by a one year warranty. Need to make a claim, get a replacement, or have questions? Click to get started.

Cubelets Resources.

Everything you need to teach with Cubelets robot blocks.

Explore a huge collection of K-12 lessons, activities, guides, training, and more.

New to Cubelets?

Learn everything you need to know to start creating more with Cubelets robot blocks in this handy Getting Started Guide.

Go further with Cubelets apps.

Go beyond the building blocks and play with the code inside. Cubelets apps make it easy to create even more with your Cubelets.

Looking for some inspiration?

There are millions of robots you can create with Cubelets. Check out these robots to help inspire your inventions.

Shop Cubelets.


Cubelets robot blocks are used by educators all around the world to help students explore computational thinking, coding, and STEM. 

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At Home.

Bring home the educational teaching tool loved by teachers everywhere. Explore sets designed for learning through play.

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