BRIXO: Smart Building Blocks for LEGO Projects

Meet BRIXO: smart building blocks that let you breathe new life into your LEGO creations. These connector, trigger, and action blocks let you add Bluetooth, sound/light/proximity sensors, and motors to your creations. They are chrome-coated and act as electric conductors.

These blocks are powered by a low voltage built-in battery. They interlock to form simple circuits with no wires. More information is available here.