Security researcher hacked an old Mattel toy into a universal garage door opener. The toy in question is the discontinued IM Me, a little pocket computer that let kids chat with nearby friends. With just an open source piece of hardware and a cheap antenna, Samy Kamkar hacked the small device so that it could crack the code of any fixed code garage door system. The worst case scenario is that someone wants to break into your garage, they can use a device you wouldnt even notice in their pocket, and within seconds the garage door is open.”]
Source: https://gizmodo.com/you-can-hack-a-childrens-toy-to-open-random-garage-door-1708973020