We've established that kids are dumb. It may sound mean, but it's true. It's not their fault, though. Their brains are underdeveloped. Wish we had that excuse. All things considered, it's entertaining as hell when kids are dumb. But that acceptable (and sometimes encouraged) dumbness has some competition in that department. Because kids are also weird. They do stuff that might actually be smart but weirds us the hell out. There's also the venn diagram overlap of dumb and weird, like the kid bel…