Not really much, if any, violence. But the stepmother gets pretty sinister in her plans, including having Lucifer go to kill Cinderella (which ultimately fails).

The Stepmother turns Lucifer into a man who goes to take Cinderella away in a deformed pumpkin carriage to kill her, and tries to kill Jaq and Gus while doing so as well. He almost succeeds. May be creepy to young children.