I agree with Broken Promises.
Two months is nothing to celebrate.
It's a flash in the pan compared to a long term relationship.
I'd go with the year thing.
Underwear for you from Frederic's of Hollywood is a nice gesture, though, and appropriate at two months if you two are that into sex by now and if you don't mention the two month anniversary.
Cuz that would sound weird, like BP mentioned.
Just my opinion.
I'd say a nice tool set would be way too expensive and way too early.
Men like good tools that cost a bit.