The Boxcar Children have been choosen to compete against another team to look for clues on a game show.

The Aldens investigate the rumors of ghosts, disappearing props and a haunted seat in the Trap-Door Theater.

Eleven-year-old Gave enlists in the Union Army in Pennsylvania along with his older brother Davy and, as a bugler, does his best to protect Davy during the Battle of Gettysburg.

The Aldens help out at a medieval fair and try to find a valuable sword which has been stolen from the fair.

In 1777 Philadelphia, young Maddy Rose spies for General Washington's army by using an unusual code to communicate with her soldier brother.

While spending two days touring a zoo to see the baby animals, the four Alden children, aged six to fourteen, help catch an escaped monkey, participate in a photography contest, and investigate a missing camera.

When someone is trying to steal Mama Tova's secret cupcake recipe, Henry, Jessie, Violet, and Benny follow the clues to a cupcake contest where they must use their mystery-solving skills to find the thief.

Henry, Jessie, Violet, and Benny experience the fun of a drive-in movie theater when they visit a friend who owns one, but when strange pranks interrupt their fun, and a ghost is spotting walking the grounds, they wonder if the teenage staff might be hiding a secret.

The Aldens are volunteering at the local recycling center, where they find plentyof things that can be reused, including a pinata that Benny takes home. But when the center is vandalized,the Boxcar children have a mystery to solve. is there treasure amidst the junk?

The Boxcar children must track down an instrument thief in time to save Greenfield's music festival from disaster.