If you are ready to take some well deserved vacation time and are planning to head out to some tropical paradise to enjoy beaches or rivers with the family, you and your kids could have a great time treasure hunting with these ultimate beach accessory: metal detecting sandals.
These fun sandals have a small attachment, a small black box, which can be strapped around your leg. One of the sandals, the right one, has a copper coil, which is powered by the battery strapped around your leg. When the sandals approach within 2 feet to a metal object below the surface, a light will come on and the detecting unit will buzz and vibrate. The sandals require a 9V battery, which will supply 6 hours of functioning. They retail for just under $60.
Article source: http://inventornotes.com/2012/01/28/metal-detecting-sandals/