Joe Lingeman for TIME Several years ago, B’zT founder Kiyeon Nam had what she recalls as a terrifying experience: she briefly lost her then 3-year-old daughter in a mall. The incident spurred Nam to research child-tracking devices and then, finding the options lacking, to create one of her own. B’zT’s tracking devices—which won a 2019 Edison Award—are machine-washable and come embedded in kid-friendly T-shirts and patches, which start at $19.99. Parents and teachers can use the company’s free app to monitor the locations of kids wearing the devices. —Emily Price
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