I Not Stupid Too (Chinese: 小孩不笨2; pinyin: Xiǎohái Bù Bèn Èr; lit. 'Children are not stupid 2') is a 2006 Singaporean comedy film and the standalone sequel to I Not Stupid (2002). It portrays the lives, struggles and adventures of three Singaporean youths—8-year-old and Primary 2 student Jerry Yeo Xueqiang, his 15-year-old brother Tom Yeo Xueqian Secondary 3 student and their 15-year-old good and best friend Lim Chengcai Secondary 3 student—who have a strained relationship with their parents. The film explores the issue of poor parent-child communication.

The director and screenwriter, Jack Neo, was inspired to make the film by a book about appreciation education. The movie was produced by MediaCorp Raintree Pictures on a budget of S$1.5 million. It stars Ashley Leong, Shawn Lee, Joshua Ang, Xiang Yun, Jack Neo and Huang Yiliang. Filming took place at several Singaporean schools in June 2005.

The film was released in cinemas on 26 January 2006, and earned over S$4 million in total. The film became the second-highest grossing Singaporean film in history: only Money No Enough grossed more. At the 2006 Hong Kong Film Awards, it was nominated for Best Asian Film, but lost to Riding Alone for Thousands of Miles. Critical reception was largely positive, though some criticized the film as overly preachy. A serialised version of the film was aired on Channel 8, and a Malay language remake was produced 4 years later known as Aku Tak Bodoh, where the title is the Malay translation of the previous installment.

A standalone sequel titled I Not Stupid 3, is scheduled to be released on 6 June 2024.