Startup Idea: Kids' Location Tracking Device

Startup idea to develop a wearable tracking device, such as portable bracelet, that allows parents to monitor the location of their children. The software should provide real-time location data with high accuracy, along with history tracking feature with time stamps, accessible through an online portal.

I am a stay at home mom. I would like a tracking device like a bracelet or something small to track my kids locations. It should be accurate within a few feet and have a strong signal. I would like to access their location online so I can see where they are. History of location would also be helpful with time stamps.