In Thankful, Otter B's friend Franklin takes a trip to the Race Car Museum, and Tabitha gets a new scooter--but instead of being happy for them, Otter B is jealous. While Otter B is feeling sad, Felicia and Roscoe arrive with their Gratitude Jars. Together, they show Otter B all the things they have to be grateful for. Otter B stops feeling sad about the things he wants and learns to be thankful for everything he has.