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

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.

The smart bricks – in the shape of a normal two-by-four Lego brick – are being launched in three Star Wars-themed sets and are powered by a custom-made chip smaller than a single Lego stud.