The idea is to use an unmodified S2, the GUI Program Maker, and long exposure photography to "print" messages with the S2's LEDs in Dot Matrix format. This should be a fun and impressive project for new learners in robotics (requiring some good problem solving skills - without having to do it all). The design should easily transfer to the new S3.
This all began over on the Nikos' Fibonacci Spiral Challenge Thread.
Scribbling with the Pen Port and Chalk led to scribbling with LEDs and capturing the images with long exposure photographs. The first posts were here
by Carol Lynn Hazlett.
Work continued with other ideas - use of the stock LEDs, spirographic scribbling, etc. All of these are recorded on the Nikos' Fibonacci Spiral Challenge Thread.
S2 LED Dot Matrix Printer:
At some point, I got the idea of using the stock LEDs to "print" in a Dot Matrix format. Since there are three (not including the "power" LED, I knew it would take two passes. Because the S2 has excellent encoders I figured a carefully configured turn at the end of a line - along with a return trip to the starting point could achieve this.
Using a stock (or unmodified) S2 and the GUI Program Maker (no Spin required) would be ideal for beginners.