New sensor-packed Smart Bricks introduced at CES add color, sound, and interactivity to classic Lego builds, debuting with Star Wars sets this spring.

The Smart Brick looks very similar to a normal 2x4 Lego brick, but it contains a custom Application Specific Integrated Circuit (ASIC) chip which is smaller than one of the studs on the brick itself. It’s joined by an accelerometer and a copper coil, and Lego has created its own Play Engine and Neighbor Position Measurement (NPM) system.

Lego has unveiled new digital “smart bricks” that light up, emit sounds and respond to movement in its “most revolutionary innovation” in nearly 50 years.

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