Make your LEGO ambulance, LEGO police car and LEGO techno club more realistic with Brick Brites, transparent bricks embedded with LEDs that are compatible with your “favorite construction blocks”, as long as your favorite construction blocks are LEGO.
The LEDs are activated when you tap the brick and are supposed to last for hundreds of hours, which is good because I’m not sure if the batteries inside are easily replaceable.
ThinkGeek sells Brick Brites for $10 (USD) per pair. You can choose from red/white, blue/white and green/white LED variants.