When hearing the word "kuzhanthaigal" (children) in the context of Tamil movie songs, the song "Chellam Chellam" from the movie "Album" (2002) comes to mind. This heartwarming song is about the love and joy children bring into our lives. It was composed by Karthik Raja and sung by Hariharan and Harini. The lyrics were penned by Pa. Vijay.