We eat a lot of boiled eggs in Germany...it's a German thing. I've been saving the shells for various Easter-related ideas, but decided to use some of them to get ahead on some summer planting for our balcony. I picked up the ceramic egg crate from Depot, used a toothpick to punch a drainage hole in the bottom of each shell, and filled them with potting soil and seeds (funnily enough, it was Martha's 'daily craft' recently).
It's been a long time since I've tried growing seedlings to transfer. Have you ever tried it? What are you growing?