What are some good pranks to pull on my Brothers?

So, in a week my familys are goin to a beach house in California and im trying to prank my 2 older bros. They pulled a couple of pranks on me in the past so i want to get some revenge. some of the pranks i read online aren't that good. Nothing that requires expensive material though. And please none of that shaving cream crap, that **** is old. So pretty straight forward question, help me prank my cousins