They’re making one that will actually work!!! Using computer technology, the clock will display digital faces for each member of the family on everyone’s own clock hand. The computer will track where family members are by checking their cell phones, and the hand will then move to point to "Home", "School", "Work" or "Mobile". It won’t be on the market for several years, yet, but it’s amazing. I just wish they would make it look like it came from the Weasley’s home. Check it out:

Brief Article

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Picture of the clock used in the HP 2 movie