Air Mail

Whenever my husband or I have a reason to give something to each other, we always give a book. There may be other presents, too, but there's always a book also. I think it isn't very difficult to find something for me, because there aren't a lot of topics I'm not interested in. 

To find something for my husband is a lot more difficult. What sort of book do you buy for someone who reads a book called 'Calculus' before he goes to bed? And yes, 'Calculus' is just what you think it is when you hear its name: a book about math, a book full of formulas (my husband is a scientist, as you may have guessed). So most of the time I give him books about places where we've planned to go, because anything with formulas in it is beyond me.
This month we go to Antwerp, Belgium. It isn't really for Valentine's Day, but because we go without the girls, it's sort of a romantic weekend, so I bought a Lonely Planet about Belgium and packed it as a Valentine's present.
I made the air mail envelope myself. It's crochet and cross stitch.

 www.betweennapsontheporch.net

I found this idea here.