So, ahead of a seaside holiday I fancy getting a pair of GPS trackers for the kids - six and two. I've had a look, and I can get a 'smart' watch for anything from £20 to £200, all of which get extremely mixed reviews. I can also get the Vodafone V-Bag, which is a rebranded Alcatel tracker, for £59 with a £3-a-month data-only SIM, and that gets better reviews from what I can see (and has four-day battery life, and is waterproofish.) Only snag: for some reason the V-Bag, which is a small puck-shaped object that comes with a silicone case for attaching it to your bag, doesn't come with nor have the option to buy a wriststrap. Yeah, I thought that was a bit of an oversight, too, especially as Vodafone's pushing the "keep your kids safe" angle. Does anyone have any experience of kid-tracking GPS stuff? Any recommendations?