Birthday surprise for a special person?

Its sweet when you combine something nostalgic or meaningful between the two of you...an inside joke or something that only you two share...and make a gift..funny or sentimental out of it. It doesn't have to be expensive...and it will show that you are thoughtful and that you think and care about the two of you enough to do that. Wish I could give you some ideas but only you know the cool things that you guys share.