You can say "imut" or "lucu", but "imut" is more common to say for a child

Cute: Lucu Little boy: Anak laki-laki He is: Dia He is a cute little boy: Dia anak laki-laki yang lucu Goodluck! :)

-Dia anak yang lucu ya-

As aswin said, "imut" (or imut-imut) is more common to say for a child. You can also say "lucu". But it can mean "funny" depending on the context. You can also say "manis" which literally translates to "sweet".