Lego Sherlock Holmes figure focuses a light beam on a Lego criminal with a small magnifying glass.

High-Tech LEGO Chapter 11: The LEGO Laser Light Show

Here's a video of the LEGO Laser Light Show built in Chapter 11. The projected pattern changes every 5 seconds as a motor setting changes. The gaps in the laser line patterns seen in the video aren't really there--this is an artifact of frame rate in video recording.