Xavier learns all about playing the recorder when he meets Johann Sebastian Bach.

Marie Curie inspires Brad to follow his dreams.

The kids meet spooky storyteller Mary Shelley who shows Xavier how to tell a story that is both spooky and silly.

Harry Houdini teaches Brad how to keep calm when he's scared.

Yadina is excited when she's chosen to be the leader of her Nature Troop, thinking this a great first step toward becoming President one day. Only problem is, she isn't entirely sure how to be a good leader.

Susan B. Anthony helps Brad show his friends that everyone should have a vote.

Xavier tries mini golf for the first time, and things don't exactly go as planned. No matter how hard and fast he swings, the ball never goes in the hole... To the Secret Museum! Our trio are sent back in time to meet an expert in the laws of motion: Sir Isaac Newton. Isaac is in the middle of his own problem, trying to figure out how he can out jump boys who are clearly bigger than him.

Golda Meir shows Yadina that she should tell people when there's a big problem, so it can be solved together.

Brad meets Winston Churchill and learns the importance of speaking up for yourself.

Xavier talks to Cleopatra about how to ask his parents if he can stay up late to see the super moon.

Catherine the Great eases Brad's fears about going to day camp without his best friends.

Yadina is unsure about bringing an old quilt for show and tell, but artist Tomioka Tessai helps her realize the best items are ones connected to family.

Despite all the cracked eggs, the Wright Brothers encourage Xavier and Yadina to continue their egg drop experiment.

The Bronte Sisters help Brad overcome writer's block.

Xavier is afraid he will be unable to perform his comedy show after he hurts his wrist, but Mark Twain shows him that laughter can make hard things easier.

Abigail Adams helps Yadina realize that a missing color will not ruin her painting.

Watching Julia Child follow a step-by-step recipe encourages Xavier to do the same to build a model airplane.

Neil Armstrong inspires Yadina to try new things.

Helen Keller teaches Yadina that there are many different ways to learn.

Alexander Graham Bell shows Xavier and Yadina how to help Brad after he loses his voice.

Florence Nightingale shows Xavier and Brad why they should work hard to help cure Yadina’s hiccups, because it’s important to help others as best they can.

George Washington Carver shows Xavier just how important plant life is, and why we all need to help take care of the Earth.

Leonardo da Vinci shows Xavier that he doesn’t have to pick just one after-school activity, because it’s okay to try many different activities.

Amelia Earhart shows Brad that if there’s something he really wants to do, like ride in the bike rodeo, he should go for it.

Zora Neale Hurston helps Brad feel more comfortable sharing a personal story he wrote, by showing him that stories are best when you share them with others.

Charles Dickens shows Yadina that she doesn’t need new toys, because her imagination can make everything more fun.

Jackie Robinson helps Yadina when a child on the playground makes up rules that are unfair.

Anna Pavlova encourages Xavier not to give up being a magician just because he made a few mistakes.

Mary Leaky helps Xavier develop a strategy for a difficult scavenger hunt -- slow down and look around.

Alexander Hamilton helps Yadina realize that starting first grade is an exciting adventure.

Theodore Roosevelt helps Brad overcome his dislike of creepy crawly things, showing him that nature needs space to live and grow.

Eleanor Roosevelt teaches Xavier that any job can be amazing as long as you help others.

Lou Gehrig helps the gang focus on the good stuff rather than moping about a few bad breaks.

Marie Owens shows Xavier, Yadina and Brad how to solve problems in a positive way.

Xavier is upset thinking he won't be able to bring the museum to his friend in Japan, but Nikola Tesla encourages him not to give up.

Nellie Bly helps Yadina overcome her fear of the monkey bars.

An argument between Xavier and Yadina ends badly, but Maya Angelou helps the siblings find a way to forgive each other.

Frederick Douglass helps Xavier when he becomes frustrated with his schoolwork.

Louis Pasteur helps Xavier with his volcano experiment project.

Rachel Carson helps Brad figure out a way to help butterflies migrate.

Brad gives up on hide-and-seek until Kate Warne helps him figure out how to play the game better.

Sir Arthur Conan Doyle helps Xavier decide what to get the new girl in class for her birthday.

Cesar Chavez helps Xavier, Yadina and Brad find the inspiration to tackle a big mess in the playroom.

Dolores Huerta teaches Xavier, Yadina and Brad that it is important to speak up when they see someone in need.

Xavier and Yadina overcome a sibling spat with the help of Confucius.

Sacagawea helps Xavier and Brad realize that just because Yadina is younger, she can do more than they think.

Mary Anning inspires Xavier and Yadina to continue working on a tricky art project.

Charlie Chaplin helps Yadina cheer up Dr. Zoom.

Billie Jean King encourages Brad to take his first ballet class.

Arthur Ashe helps Xavier, Yadina, and Brad see why they were wrong to exclude a new student at school from their game.

Xavier, Yadina and Brad learn a lesson about treating everyone equally when they meet Rosa Parks.

Thurgood Marshall shows Xavier how to be fair with everyone when it comes to a big piece of pie.

Xavier, Yadina and Brad learn about courage and bravery when they meet Harriet Tubman, a woman who escapes slavery and risks her life to help others do the same.

Wilma Rudolph encourages Xavier to stay with track and field even though he thinks he should quit.

Jonas Salk explains that you don't need a reward for doing a good deed.

Jesse Owens encourages Brad after he becomes frustrated with bowling.

Ella Fitzgerald inspires a nervous Brad to go to a dance party.

Inventor James Naismith inspires Xavier, Yadina and Brad to invent their own game.

Temple Grandin helps Yadina make friends with a new boy from her class, Ben.

Albert Einstein encourages Xavier to ask questions when he is curious about something.

Carol Burnett helps Yadina overcome her fear of looking silly by explaining that sometimes it is good to laugh at yourself.

Yadina gets advice from Abraham Lincoln after she accidentally loses her friend's toy.

Jane Jacobs inspires Xavier, Yadina and Brad to rebuild their fort.

Edmund Hillary explains to Xavier that even the most courageous adventurers ask for help when they need it.

Yadina prepares for a special birthday performance with the help of Celia Cruz.

Jigonsaseh, the original Haudenosaunee Clan Mother, inspires the trio to stop arguing with each other.

Sacagawea helps Xavier and Brad realize they shouldn't underestimate Yadina just because she's younger than them.

Ibn Battuta shows Brad that a change of scenery might help him finish his comic book story.

Beulah Louise Henry inspires Yadina to keep working on her invention.

Rukmini Devi reminds Xavier and Yadina why their annual family walk is special.

Bob Ross shows Yadina that a small blunder can be a happy accident.

Xavier learns that he is a special person just the way he is after he has a playdate with Fred Rogers.

Michelangelo shows Brad that even when you want something done quickly, doing something well takes time.

Dorothy Levitt shows Xavier that when learning a new skill, such as skateboarding, it helps to start with the basics.

When Yadina wants to hike to the hilltop, aviator Bessie Coleman encourages her to persevere.

King Sejong the Great's openness to ideas inspires the trio to solicit KidZone suggestions from more children.

Eugenie Clark shows Brad that when he's faced with something that seems a bit scary, asking questions can help him feel less afraid.

Yadina learns how to overcome a challenge.

Ruth Bader Ginsburg inspires Yadina to realize that she has the power to create change.

Grandmaster Flash shows Xavier that if he wants to create new music for a dance party, he should experiment.

Mary Seacole shows Xavier and Yadina that there are many ways they can help Brad feel better after falling off his bike.

Hedy Lamarr shows Yadina that she can do more than one thing.

Xavier, Yadina and Brad learn that creative thinking can lead to new ideas.

James Braidwood shows Brad that when he is feeling nervous, being prepared can help him stay calm.

Queen Lili'uokalani shows Xavier and Yadina that being responsible can involve making hard choices.

Alvin Ailey shows Yadina that music and dance can help bring people together.

Xavier learns that his imagination can keep him company when he feels lonely.

Xavier learns that asking questions can lead to exciting discoveries.

Xavier learns it's normal to feel different emotions when it comes his turn to jump off the diving board.

Louis Braille explains there are many ways to read.

Zaha Hadid encourages Xavier, Yadina, and Brad to build their treehouse in their own unique way.

Jim Thorpe shows Brad that if he wants to play flag football, observing others is a great way to learn.

Norval Morrisseau shows Yadina that art has the power to share important ideas.

Roberto Clemente encourages Xavier, Yadina, and Brad to help however they can when they realize the museum water fountain is broken on a hot day.

Kristi Yamaguchi shows Yadina that it's okay to ask for help when she's learning how to roller skate.

Madam C. J. Walker shows Xavier that working hard on his lemonade stand can help him afford the pogo stick of his dreams.

Edwin Binney shows Xavier, Yadina, and Brad that to work together as a team, they should listen to everyone's ideas.

William Shakespeare shows Brad that it is alright to feel how he is feeling.

Katherine Johnson encourages Yadina to be proud of her love for turtles.

Bruce Lee helps Xavier and Brad realize that no matter how angry they get, they are in charge of what their body does.

Sonia Manzano shows Yadina that telling stories can help manage big feelings.

Jerry Siegel and Joe Shuster encourage Brad to believe in the power of his imagination, even when other people don't.

Edmonia Lewis inspires Xavier to proudly create a piece of art for his mom that represents their family.

David Suzuki shows Xavier that when we take care of the earth, we take care of ourselves too.

Esther Martinez tells a traditional Tewa legend, which helps Xavier and Yadina realize how stories can connect us to our family histories.

Gwen Ifill shows Yadina that asking questions is a great way to get information.

Matthew Henson shows Xavier and Brad that they can learn from each other.

Kofi Annan shows Yadina and Brad that when they can't agree on how to spend their fundraiser money, finding a compromise can help everyone.

William and Caroline Herschel show Xavier that including Yadina in his magic show can make it even more fun.

Willard Wigan shows Yadina that slowing down can help her make friendship bracelets more carefully.

Maria Sibylla Merian shows Brad that he can have fun while waiting for flowers to grow.

Jackie Robinson shows Xavier that it takes courage to change something that isn't right.

Ravi Shankar shows Yadina that it feels good to share her culture.

Babe Didrikson Zaharias shows Yadina that being prepared can help you do difficult things - like making the basketball team.

Grace Hopper shows Brad that he will never know if he can build his robot differently than everyone else unless he tries.

Itzhak Perlman shows Xavier that when he struggles to learn music the same way as the other kids in the band, he can do it his own way.

Xavier travels to meet heroes Christopher Reeve, Kitty O'Neil, Oprah Winfrey, and his own ancestor.