Some can handle regular mattress sizes; others require a special size (and shape) made specifically for an RV. Understanding the different size options and what they mean will be your first step ...

MIAMI GARDENS, Fla. -- It sounds like a 10-year-old's wildest dream: Take nearly 400,000 Lego bricks and build a life-size Formula 1 car capable of completing a lap of the Miami Grand Prix circuit.