A boy and a girl share a short kiss after the boy is found and saved from a bad fate, but they are young children and this is clearly intended as a relieved and concerned gesture, not a sensual act.
Violence & Gore
Mild
The villain's car crashes in a forest (he does not appear to be injured, however) and the trees (who are sentient) whack him away with their branches.
Profanity
None
None.
Frightening & Intense Scenes
Mild
Professor Coldheart (as well as the general idea of children running away or becoming lost and a strange adult luring or tricking them into danger) may frighten young children and somewhat disturb parents.