The Truck: Bob’s Donuts, parked every weekend in Ballard near the Goodwill or in Fremont at the Sunday farmers market.The Fare: Donuts galore!The Stop: When I walked up to the rear of a horse trailer that I saw people lined up at, I expected them to be looking at, duh, a horse. Maybe it’s some type of mobile petting zoo, I thought. And those spheres catapulting through the air at a rate of half-a-dozen per minute? I certainly hoped they weren’t flying pieces of horse poop, because that would’ve just been weird, not to mention gross.Instead, they were air-born fried balls of dough from Bob’s Donuts, which made its entrance into the donut arena earlier this year. Shana Carmody came up with the idea of horse-trailer donuts after spotting a trailer-turned-espresso-truck at a farmer’s market in Vancouver. She had recently been laid off from her job at WAMU and thought selling donuts from a horse trailer seemed like a cost-effective idea. But who’s Bob? And why are these his donuts?Carmody said she was driving along Aurora one day when she saw a loan company with the name “Bob” in it. The name “Bob’s Donuts” seemed straightforward — like the donut truck she wanted to open.Now, when Carmody isn’t in class — she’s back in school to earn a degree in healthcare informatics — she and her daughter are on donut duty every weekend in Ballard near the Goodwill or in Fremont at the Sunday farmers market. Carmody makes the donuts and her daughter makes the frosting.Inside of the metal walls, dough balls are plopped into a fryer that flings them to completion in 10 seconds. Then they’re dusted with familiar donut offerings: powdered sugar and cinnamon or chocolate frosting and sprinkles. Bob’s also has pumpkin spice-flavored donuts, which actually tastes like fall in a ball. They’re hot, puffy, crispy-on-the-outside, soft-on-the-inside orbs filled with hints of this season’s most popular vegetable.The menu certainly isn’t expansive, but at least its offerings aren’t too expensive. At $3.50 for a dozen donuts, it’s hard to say “nay” to these goods. In the future, Carmody says Bob’s Donuts might be launching something savory — stay tuned for those developments.Follow Voracious on Twitter and Facebook.