What should I bring to this sleepover ?

So I'm in colorguard and every year they have a like welcome sleepover thing . Well I'm a freshman and I'm supposed to bring an appetizer . But on the invite it says like cookies or brownies fruit basically anything. It's a sleepover so I don't want to bring something lame. But what should I bring (needs to be enough to serve 24 girls) thanks in advance :)