The naughty and lovely members of the Tyrannosaurus Rex team, Tutu, Brush, Dalong and Erlong, always play some "pranks" in the kindergarten that give parents and children headaches. Just when the parents were overwhelmed by this series of problems, the "ugly-looking but kind-hearted" Grandpa Niu became the most feared person by the Tyrannosaurus Rex team led by Tutu and Brush. However, as they got in-depth contact with the clever Grandpa Niu, the Tyrannosaurus Rex team learned that the best "prank" is to make others happy and even feel happy. For this reason, the Tyrannosaurus Rex team and Grandpa Niu came to the old people's home and held a carefully planned performance, which brought joy to the lonely old people and also got unexpected surprises. As a result, the "Tyrannosaurus Rex" call was issued on the Internet, starting a vigorous "Tyrannosaurus Rex Action"!