Aunt Jane takes the Aldens to Florida to visit her friend Kay! Kay owns an old motel, but it's so rundown she thinks she might have to sell it. The Boxcar Children are happy to help her fix things up, but soon they learn someone is trying to keep the motel closed…forever.
When the Greenfield Animal Shelter is forced to close, the Boxcar Children offer to care for the abondoned animals. But then they discover that many belong to an old woman who appears to be missing. Where is she? And who are the strange men living in her house? Before they know it , the children have another mystery to solve.
The Aldens help restore an old library by cleaning up and clearing out old books. But while they work, they hear mysterious footsteps on the second floor. Then someone sneaks in and makes the library just as messy as before. Why would someone want the library to stay closed?
The Alden children travel on a Mississippi paddle-wheel steamer to visit an old family friend in his cabin near Hannibal, Missouri, and try to discover who is responsible for the mysterious activities near the house.
When Benny and Henry get summer jobs at a department store in town, they don't expect to be solving mysteries at work. But when an expensive vase disappears, the salespeople receive strange notes, and the jewelry display is tampered with, it's up to Benny to uncover the truth!
The Boxcar Children take a bus trip to the Science and Hobby Fair, but a bad storm forces them to stay at a bus station along the way. Soon they are in the middle of a mystery involving a polluted river, two strange boys, and a suspicious bus station manager.
When the Boxcar Children find a mysterious journal hidden behind the wall of the guest room, it leads them on a search for a valuable coin collection. But what happened to the journal's owner, and what is she trying to tell them?
At the beach, Benny finds a valuable gold locket and decides to try to find its owner. Soon the children are caught up in a puzzle involving strange visitors at the beach and the mysterious Miss Smith, who seems to live along in the big Tower House nearby.
At the beach, Benny finds a valuable gold locket and decides to try to find its owner. Soon the children are caught up in a puzzle involving strange visitors at the beach and the mysterious Miss Smith, who seems to live along in the big Tower House nearby.
A family moves into the house next door! The Boxcar Children decide to make friends with their new neighbors by building a tree house with them. In the process, they notice a window in their neighbor's house that nobody knows about. Does the old home have a secret?