I'm so over the "traditional" anniversary gifts (paper/cotton/iron etc) and was thinking we could create a sex toy version. Personally I'd hit the first few years with a bit of passion for the honeymoon period, then a few solo toys for when life takes over around the 7 year itch, then bring out big guns as you grab life by the balls and start to really explore your kinks.
Here's my starting suggestions: 1st: Classic Bullet - a must in any toybox and so versatile.