How Lego's Smart Brick works | The Vergecast

Quick Overview

The LEGO Smart Brick, which Sean Hollister reports was arguably the story of CES, functions as a 2x4 electronic brick containing computing power, an NFC reader, color sensor, and IMU sensors, allowing its function to be redefined by tapping NFC tiles, though LEGO currently restricts user programming in favor of predefined experiences.

Key Points: The LEGO Smart Brick is a 2x4 electronic brick housing a custom ASIC chip, NFC reader, color sensor, and IMU sensors, enabling it to run different programs based on NFC tiles. LEGO piloted the Smart Brick in certain markets two years prior in 2024, and while patents were known in niche communities, its surprising quality was the main takeaway from CES. The brick's function is determined by NFC tiles; for instance, one interaction allows the Emperor minifigure on his throne to activate the Imperial March, while another set allows rocking the brick to change the speed of the Cantina band sounds. A key feature for convincing long-term fans is the color sensor, which interacts with regular LEGO bricks; raising a red flap over the sensor activates firing, and covering it with a blue tile initiates refueling sounds. LEGO confirmed they know users want the bricks to be user-programmable, but SVP Tom Donaldson stated they must first ensure the product is 'very safe and hack-resistant' before pursuing that. The inherent debate surrounding the Smart Brick mirrors long-standing LEGO arguments about specialized pieces versus creative repurposing and whether expensive sets should remain assembled or be disassembled. LEGO intentionally excluded screens and AI from the Smart Brick, designing interactions based on observing how kids actually play, such as registering a physical knock-over as a successful hit rather than requiring precise targeting.

Context: The Vergecast episode features David Pierce and Sean Hollister discussing highlights from CES, focusing heavily on the newly unveiled LEGO Smart Brick, which surprised many by becoming a major story of the event. The discussion centers on the technology behind the brick, its implications for LEGO's creative philosophy, and the ongoing debate among fans regarding pre-defined play experiences versus open-ended creativity, especially in contrast to the company's history of specialized elements.