Cake. You definitely need cake, usually his favorite kind of cake, and usually with like cute decorations on it. And you should have little party hats, like the pointy kind with little elastic bands that go around your chin.

And you have to sing "happy birthday". Loudly.

Usually there's gifts and things, too, but since I guess people can make anything they want here, so that's probably a little less of a thing. I mean, unless you have some really cool idea that you don't think he'd think of, and you can surprise him with. But it should be wrapped in fancy paper for him to unwwrap so it can be a surprise, if you're going to do that.

Also, hi, I'm Jolie. What's spacer culture?