What small gifts should I bring for my boyfriend's family when I visit them in Colombia?

I’m not going to have a lot of room in my suitcases, so the gifts will have to be small. I suppose they should also be relatively hardy objects, too.

I have no idea what kind of stuff to bring for a middle aged man and woman and their 23 year old son (I’ve never met them before, by the way). I’ve got the teenage daughter covered, though!

Should I bring traditional gifts or should I try to find “USA” gifts? (Maybe Montana stuff, since MT is my home state?) What do you think?