Runaway Princesses, Princess Ballerina Book 1 (Princesses of Chadwick Castle Series 2)

Princess Elle hears a dreadful rumor about her ballerina friends. Perhaps bandits have captured them. Or they were shipwrecked on their way home to France. She and her eleven-year old sister, Belle, seeks to discover the truth. But how do they escape the watchful eyes of their ladies who constantly waited on them? They devise a plan and their adventure begins.