Little girls love princesses. Little girls love parties. Therefore, little girls love princess parties. Chances are, your daughter has been playing princess since before she could work the DVD player by herself to watch “Frozen” just one more time. So when you’re planning her birthday party this year, it may be hard to make the princess theme feel fresh. How about inviting each guest to transform herself into a princess upon her arrival at the birthday ball with the following kid-safe princess party updates?