Dandellas were outlandish uses of GPS technology, here's one that comes mighty close to one-upping even those. The GPS-enabled wind chimes have DIY written all over them, and while the chimes themselves where purchased (after a failed attempt at creating his own, notably), basically everything else that makes the system tick was homegrown. Utilizing Mologogo, servos, circuit boards, and a good bit of coding, the GPS chimes emit their music whenever the tracked individual's cellphone moves in a user-selected path, essentially acting as an alert that someone's headed to their domicile. Of course, the actual options here are a tad limited (albeit very intriguing), but the foundation of the project could indeed be used for a much broader geo-tracking scenario. Regardless, we know there are folks out there eager to give this a whirl, and thankfully for you, everything you need to know (including the oh-so-critical code) is just a Read link away.