How do I avoid boredom at work?

I work at an ice cream place and my days are spent doing the same 3 things: scooping ice cream, ringing up customers, and standing around behind the counter. We aren’t allowed to have our phones while we’re on the clock. I chat with my coworkers sometimes, but there’s a pretty significant age gap there with almost all of them (I’m 15 years old — this is my first job, I’m not used to working lmao) so it’s kind of weird. It would be boring even if I didn’t have ADHD; but the ADHD just adds a whole extra layer of impossible boredom. I’m grateful to have the job and be making money and all that — but my gosh I am a teenager and it’s summer and I wish I didn’t have to be cooped up in there all day. Is there anything I can do that would make this less boring?