The whole set costs HK$128 (about $16), available for purchase at the flower market located in Victoria Park, Hong Kong. There’s no actual slingshot for you, all you have is a large elastic band which requires a person to hold it firmly. So, you can fire the inflatable birds at a bunch of inflatable piggies. Sounds pretty fun to us, specially suitable for free time. Other than Angry Birds, there’s another interesting item for sale, an inflatable iPhone 4 case.