Kodomo (子供) means "child" or "children." It's a general term referring to young human beings, without specifying gender. It can be used for both a single child and multiple children. It's a common word when discussing offspring or young people in general. Example: 私は子供がいます。(Watashi wa kodomo ga imasu.) = I have children.

若(わか)い人(にん)間(げん)、特(とく)に自(じ)分(ぶん)の子(こ)を指(さ)す一(いっ)般(ぱん)的(てき)な言(こと)葉(ば)です。例(れい)：私(わたし)は子(こ)供(ども)がいます。