Xavier Riddle and the Secret Museum  Xavier Riddle and the Secret Museum is a Canadian-American children's animated television series that premiered on November 11, 2019, on PBS Kids. The series is produced by 9 Story Media Group. It is a concept of the children's book series written by Brad Meltzer and Chris Eliopoulos, named "Ordinary People Change the World". The series involves Xavier Riddle with his friends, Yadina, Brad, and Berby, at the Secret Museum, and help from historical heroes, who are depicted in the series as children. The series involves Xavier Riddle with his sister Yadina Riddle and their friend Brad. In each episode, a problem or difficulty is encountered. They go to the Secret Museum, to time travel to the past, to observe, interact, and learn from the historical heroes. They then return to the present, and use their experience to solve the problem. Each episode of "Xavier Riddle and the Secret Museum" runs for half an hour. They consist of two 11-minute stories based on famous historical heroes around the world in the past. There may be an interstitial segment between the two main stories, in which Berby, and either Xavier, Yadina, Brad, or Dr. Zoom, are shown doing something fun together. A TV special titled "Xavier Riddle and the Secret Movie: I am Madam President" aired on March 16, 2020. In the special, Yadina, who dreams of becoming president one day, realizes all the presidents were men. She questions if she can still be president, even though it is something no girl has done yet. The trio visit the Secret Museum, where a five-part star is shown to them. They travel to different periods in time, where they meet women who are attempting to do something that has never been done before. Yadina learns from them on what is needed to do something that has never been done before, as she attempts to complete the star. Brad Meltzer has been writing novels, nonfiction, television and comic books for over 50 years; his children’s books were his favorite. He wrote the book "Ordinary People Change the World" and began a series based on the book named the Ordinary People series in 2014 with "I Am Abraham Lincoln", "I Am Amelia Earhart", "I Am Rosa Parks", and "I Am Albert Einstein". The series is produced by 9 Story Media Group's animation division, Brown Bag Films. 9 Story's Chief Creative Officer Angela Santomero states that "Xavier Riddle" lets kids know they have "the curiosity and adventurous spirit to change the world".