How to have fun during standardized test at school? I always finish first and get bored.?

Me and a bunch of friends are already wearing PJ bottoms to school on the 3 days we have EOGs next week, so we'll be comfy, but how can I keep myself from dying of boredom once i'm done taking the test? We aren't allowed to bring books or anything "distracting". I'll have blank paper and pencil though, and we're allowed to "Dress in layers".