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 Smart Bricks - tech-filled versions of its small building blocks - which it says will bring sets to life with sound, light and reaction to movement.

The new bricks launch in March as part of Lego’s new Star Wars range, with each two-by-four piece containing sensors, sound synthesisers, an accelerometer and custom-made silicon chips capable of dete...