Lego is rolling out a high-tech twist on its classic bricks, though not everyone is thrilled about it. At CES 2026 in Las Vegas, the Danish company introduced "Smart Bricks," sensor-packed tiny blocks that light up,

The new sensor-packed Smart Play Brick will land this spring as part of a special Star Wars collection. The update adds interactive lights and sound to the Lego experience—including the minifigs.

This is a home made Galvanic Skin Response sensor (a.k.a. lie detector). It's just a Lego motor wire and aluminium foil hooked up together to your fingers, giving an electrical reading to fingers, by measuring how relaxed and dry your fingers are.