Toddler Cooper and his dad Chris O’Brien blew up for their videos of the pair’s morning routine, which often featured them sitting on a curb near their home

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Cooper, known as “Coop on a Stoop,” gained viral fame for morning curbside routines with his dad, and now he’s off to school

His parents, Chris and Hailey O’Brien, shared emotional TikToks celebrating his first day of school

Millions have followed Cooper and Chris’ sweet father-son moments on the social media platform

Viral TikTok toddler Cooper, known to his family’s TikTok followers as “Coop on a Stoop,” is off to school!

Cooper, who went viral last year with his dad, Chris…

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