While sightseeing at the Alamo, the Boxcar children investigate the disappearance of a priceless ring from the Alamo museum.

While visiting Michigan's Upper Peninsula to prepare their Great-aunt Sophie's big old house for sale, the Boxcar Children encounter a mystery involving a valuable ring supposedly hidden somewhere in the house. Includes puzzles and activities.

While sightseeing in Niagara Falls, the Boxcar children investigate a rash of souvenir store thefts. Includes related puzzles, games, and activities.

While visiting their cousin's pineapple plantation in Hawaii, the Aldens hear a local legend about a black pearl with a curse on it and investigate mysterious incidents on and around the plantation.

At the request of their distant relative Althea, the Boxcar Children arrive at her old Virginia mansion and investigate the mysterious incidents happening there.

The Alden children visit a family friend at his apple orchard which is rumored to be haunted, but instead of a ghost they find that some of the families' valuable antiques are being stolen.

While visiting Chicago with their grandfather, the Alden children begin receiving mysterious clues to a treasure hunt. Includes related puzzles, games, and activities.

The Aldens try to help a visiting Russian gymnast who is surrounded by mysterious people and events and who seems to have a secret.

While visiting a friend in New York City, the Aldens investigate the theft of a valuable diamond.

The Aldens investigate a mystery involving a legendary mining expedition to the gold fields of Alaska.