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