Rhett Allain has some suggestions for gift-giving during this holiday season. Why he called his post a "physics gift guide", most, if not all, of the items are more "technical" and engineering in nature (except for books, of course).
I would add to that list something that a physicist or physics student might find useful. How about a scientific spreadsheet and plotting software? Many of these, such as Origin, are horribly expensive to own individually. But something such as Psi-Plot is quite affordable and has almost all the bells and whistles that one would need.
For a casual physics enthusiast, especially those who are caught up in al the hoopla with particle physics and the Higgs, one could get merchandise with various "geeky" prints at zazzle.
Do you have anything to add to this list?