The Cube Combo includes our classic Battery Cube is the power source for your circuits. It has a positive and a negative terminal. When you turn on the power switch, it delivers approximately 3.7 - 4.2 volts DC to your circuit.

Also included is our Geared Motor Cube. This mighty little motor actually rotates at more than 1,000 RPM (rotations per minute), but the tiny gears attached to the motor shaft reduce the rotations to about 75 RPM. This ensures maximum torque to turn the wheels or gears of your projects.

The LED Cube is a really bright light, making a perfect searchlight for your vehicle or beacon on top of your lighthouse. An LED is a polarity- sensitive device, which means current only flows in one direction. If the LED does not turn on when you connect the wires to the battery, try reversing the wires to reverse the current flow.

Fits your bricks! Works with all LEGO® & MegaBloks®-type construction bricks
Seamless circuit connectivity (no soldering)
Safety-tested & approved for ages 8+
Created by STEM teachers, tested by kids

IMPORTANT SAFETY INFORMATION Handle Circuit Cubes with care. They contain sensitive electronic components, including batteries, and can be damaged or cause injury if dropped, burned, punctured, crushed, disassembled, or if exposed to excessive heat or liquids. Do not use damaged Circuit Cubes. BATTERIES Do not attempt to replace the batteries yourself. You may damage the batteries, which can overheat and cause injury. DISPOSAL The lithium-ion batteries in your Battery Circuit Cube should be recycled by Tenka Inc. or an authorized service provider. For more information about Tenka Inc. lithium-ion batteries, visit Cube Care.