Very cool idea from Dan over at adafruit: Use an OLED display module to create working scale train schedules, plane schedules, TVs, or other flat-panel displays for your Lego models. Dan’s written a handy tutorial covering the electronics, linked below, and adafruit sells a breakout board with built-in OLED module and microSD card reader for $30.

OLED LEGO Train Schedule

How-To: Retrofit a Magic 8-Ball with an OLED Display