Grandpa's Old Cane

Marvin and Mia's grandparents have Alzheimer's disease and their memories are leaving them one day at a time. Marvin breaks his grandfather's cane. In the process of fixing the cane, Marvin travels to a planet where everyone has lost their memories and learns that there is magic water hidden in the universe that can help his grandparents regain their memories. So Marvin sets off on a star-crossing journey in his SUV, with Mia and her rag dolls, and a hamster. They traveled to planet after planet