It's a windy day, and the sun's bright rays cut through the scattered clouds. You're on a beach somewhere - or in your backyard, or a park, or any other outdoor place you can imagine. It's quiet - or maybe not. You've come here to enjoy yourself, perhaps swim, or play in the sunshine, or just relax. As you look around, you notice a large balloon rolling along with the breeze, its surface glimmering softly.