What should i get acquaintances for a graduation present?

im a high school senior and invited to about 15 graduation parties. some are my close friends so i know what i am going to get them but some are just yanno half friends and i dont know what to get them! for mine i def wnat money but i feel like thats weird to give i was thinking $10 gift cards but maybe i should give them $10 is that weirrd? AH