Last year I got a small coax helicopter for Christmas. It is a funny little toy. Unfortunately I nuked it after about two weeks. This month I finally repaired it. After some practice I could not resist to combine some of my Blinkenlight shields into a landing pad for the helicopter.
It may sound trivial but the setup included some small challenge because I wanted to get all lights in sync. Easy? Yes, but only if you have some pins left.
You can find a detailed description and a video in my Helipad experiment.