Oo naman, prune juice is okay for a 3-year-old especially pag constipated na, pero better to water it down a bit kasi medyo strong ang lasa at mabilis makaluwa ng tyan hehe! A few of us tried giving it sa aming kids mixed with regular juice o tubig, and it really helps with the matigasang tae within a day or two, pero kung ganap na constipated na or may other concerns, mas safe na i-check mo lang with the pedia para sure lang, alam mo na.