Any worry that Baby Groot would wear out his welcome was unwarranted. Each short zips along at a perfect pace, deploying sight gags that hit their mark every time.
I Am Groot is lively and attractive, exhibiting a polish that adds to its endearing personality. ... I Am Groot’s brevity prevents it from growing stale, and yet given that each chapter runs only four minutes, a little extra time might have let it playfully elaborate upon its conceits. ... I Am Groot is a charming gateway vehicle for future fanboys.