Name: Cubelets
Brand: Modular Robotics (USA)

$225 – $399Discovery Set $225, Curiosity Set $399 (modrobotics.com, 2026, both shown out of stock). Launch pre-order in 2012 was $160 for a six-cube kit.

Out of stockVia SSH / web / bridgeMagnetic blocksSense/Think/ActBlocklyKids 4+

Possibly ≤ 1 weekShipping: When in stock. Sold directly by Modular Robotics and resellers. Core sets go in and out of stock. Modular Robotics ↗

Remote control: A laptop or tablet pairs with the Bluetooth Hat through the Cubelets apps to reprogram block behaviors in Blockly or C. There is no general Python API.

Modular Robotics ↗Wikipedia ↗TechCrunch (2012) ↗

Overview

Magnetic robot blocks where each cube is a sensor, logic or actuator and robots are programmed simply by how the blocks are stacked. Widely used in K-12 classrooms and museums to teach systems thinking before code. Still sold in 2026 with new clip-on Hats, but the core sets are frequently out of stock.

Specifications

Category	Modular & reconfigurable · Consumer & education kits
Released	2012
Availability	Out of stock
Programmability	No SDK, app / visual programming only
Best for	Ages 6+ (estimated)
Vision sensors	No vision sensors
Actuators	DC / gear motors
Audio	No audio
Compute type	Arduino / ESP32 / microcontroller
Remote control	Via SSH / web / bridge
Size	Small cubes that snap together magnetically (dimensions not published)
Locomotion	Any shape: drive, rotate and flash Cubelets combine into vehicles and gadgets
Compute	Microcontroller in every cube, behavior emerges from data passed between blocks
Camera	None (brightness and distance sensing blocks only)
Sensors	Brightness, distance, knob and other Sense blocks, add-on Hats (brightness, distance, mood ring)
Runtime	Rechargeable battery Cubelet (runtime not published)
Speed	Not published
SDK	Free Cubelets apps via the Bluetooth Hat: Blockly or C to rewrite a block's behavior, plus a data logger