Three of the UK's biggest retailers, including online giant Amazon, are advising customers to dispose of hover boards amid safety concerns. There have been many online reports of the toy catching fire and exploding. Stores have told consumers they will get a refund if they take their hover board to a special recycling center for electronic equipment. They have asked manufacturers to address these safety issues. Hover boards are self-balancing, two-wheeled scooters that can transport users like a skateboard, but without using any physical effort. They are currently one of the most popular gifts for children this Christmas and the retailers' decision will disappoint many kids hoping for the popular device.