You can’t replace the battery in Lego’s Smart Bricks — and many of its sensors aren’t available yet

The first Lego Smart Brick sets, based on Star Wars, aren't quite what my kids and I hoped, and I suspect much of that's down to programming. But the Smart Bricks may also have some technical limitations out of the gate. The first sets don't ship with a number of their sensors enabled, including the sound-detecting microphone, the ambient light sensor, fine distance measurement, position, and orientation.

"There are more sensors that will be unlocked with future products," Lego Smart Brick...