Can you find the letter?

Uncle DJ is good-natured, charming, and full of wisdom. Both Ava and her dad, Oliver, look up to him as an honorary member of their family tree. Uncle DJ has many stories to share, including tales from the time he spent in Grimm World as a young boy. Now too old for adventure, Uncle DJ is happy to share the key to entering Grimm World with Ava, when he gives her a magical pendant on her birthday.