I've learned that geeky shirts can be cool too, and I like this one a lot: the caffeine molecule t-shirt. Of course, he who wears this shirt might be asked by the non-chemistry-literate (and I'd bet that's most of us) what this molecule is all about. And since everyone knows and lives on heavy dose of caffeine, your guy will look extra smart and clever when replying: it's the caffeine molecule (picture the grin he will have on his face as he says that). And if you want to make him smile, you can get your very own chocolate molecule tee. However, I discourage you to wear it at the same time. Way too geeky!
This is only one example of how creatively geeky you can get for Father's Day. Check out thinkgeek.com for their geeky t-shirt collection, its everything caffeine collection, and pretty much everything else. I am sure you'll find something that will turn on his inner nerd.
