The Legendaries: The Stone of Jovénia (The Legendaries #1)

We call them The Legendaries. They are five in number, and they embody the values of courage, intelligence, dignity, strength, and purity. They are tall... Or rather, they were tall... During their last fight against the Forces of Evil, things ended very badly and all the adults became children again! Now The Legendaries have to make amends for their blunder. Danaël, their leader, has discovered a way to return everyone to their true age, but the quest will not be easy...