Just bring a drink and/or some food. Ask the host what they would like to eat if you're unsure. Some prefer candies, especially in middle-school or highschool, whereas some will eat more salty stuff (usually healthy food isn't on the program).
A lot of beer of course! No class party without beer!
Might not be legal in her place to drink beer at her age, or drink alcohol though. Even though in our place, there was much worse than beer at parties 😉
