None, unless you count the battle with the Mouse King as violent. In this production, the Mouse King is not killed in the battle with the toys, but is only driven off. He returns in Act II to attack the Prince in the Kingdom of Sweets. He and the Prince disappear through a trap door, and the Prince emerges again victorious.

None. There is no dialogue.

None.

The scene in which the Mouse King attacks the Prince is frightening to Maria, but probably not to the viewing audience.