19-year-old Lily Hevesh is obsessed with dominos. She spends hours upon hours building insanely intricate designs and chain reactions before knocking them down. Sound like a strange way to spend your time? Tell that to the nearly 2 million people who've subscribed to her YouTube Channel, where she posts new domino videos every Saturday.

Check out Lily's channel:
   / hevesh5  

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How Hevesh5 Builds Amazing Domino Chain Reactions | WIRED