Other than hamentaschen, what are some traditional Purim treats? I will be visiting a friend this weekend and would like to bring a treat for the holiday.
Drinking is a big part of the holiday, so any kind of alcoholic beverage is appropriate. One that is a special treat, though, like Godiva liquor or Frangelico, would be my personal preference!
In general, giving mishloach manot / shalach manos (depending on your pronounciation) is appropriate. This is a gift of at least 2 different types of food (e.g. a fruit and a cookie, or candy and juice). Basically it's like a food-basket. People include hamentaschen, but it's not necessary. You can use any type of holder (gift bag, basket, box, etc)
People tend to eat lots of candy on Purim due to its festive nature. If you think "fun" it will be appropriate.