There're myriad ways to express your inner nerd, from attending sci-fi conventions, to dutifully reading comics despite being 30, to LEERROOYY JEENKKIIINNSSSS!!! Letting you do it with cool random stuff, Old Junkyard Boutique
The freaky baby of a Sarasota guy heavily inspired by steampunk (a sci-fi genre focused on fantastical Victorian ideas of a crazy steam-powered future), OJB crafts second-hand toys, used gears, pipe fittings, and random trinkets into one-of-a-kind accessories that'll at least establish you as a highly original, trendsetting dork. The most functional stuff's the nine flasks, including standouts like the 6oz Gothic Victorian with an antiqued bronze finish and little interlocking gears, keys, and skulls, plus another with rivets, welding lines, horseshoes, and the tag line "great for time travel, not only by men, but by women". (Women? Time travel's one thing, but women with flasks?!? C'mon dude, let's get serious.) He's also made 30 different bad-ass steampunk toy guns, with highlights like a Flash Gordon-looking pistol (with laser sound effects); a functioning Nerf revolver with a weathered iron-ish finish and "steam pressure release" pipes; and a Nerf Gatling gun with an antique bronze finish, a ray-gun nozzle, and surfaces dotted with rivets and wingnuts, not to be confused with Wings nuts, who're just a bunch of hopeless Tony Shalosers
For really costuming it up, OJB's got crazy-complex goggles that look like they were used by a mad scientist to create tiny evil robotic insects, plus freaky skull-/spike-laden gas masks -- none of which will save you from anything, of course, if you've got Leeroy on your team. Leeroy, you are just stupid as hell!