In this ninth installment in The Land Before Time series, a cast of spirited, young dinosaurs explores the familiar emotion of loneliness and the need to belong. Torrential rains have turned the Great Valley into an unfamiliar landscape, causing Littlefoot to feel lonely. "You are only as alone as you choose to be," his grandfather tells him. The flood has transported new swimming creatures into the valley, including a playful porpoise named Mo who quickly befriends Littlefoot. Yet Mo must return to his home in the Big Water and so, against parental wishes, Littlefoot and pals escort Mo on an adventurous journey back to the sea. Danger ensues, including "earthshakes" and "sharptooths," while the courageous group grapples with questions of loyalty and friendship. The strengths of the series have not been diluted; its stories continue to captivate using beautiful animation and lively music. Six original tunes make for finger-snapping fun for the younger set. (Ages 3 to 12) --Lynn Gibson