Someone or something is making a mysterious tapping sound at midnight in the home of a famous inventor known for her one-of-a-kind clocks. There is an invention convention taking place in the home and the Alden children are competitors at the convention. Does the mysterious tapping mean trouble for the convention? The children are determined to find out.

Relates the exploits of the four Alden children as they locate a missing man.

The Alden children investigate when Mrs. Murray's jewels are stolen during a party for the Starlight Skating Troupe.

"Jessie and Benny are participating in the Great Greenfield Bake-Off, a local baking competition for kids. But ingredients get mixed up during the competition and then the power goes out. Is someone trying to put an end to the contest?" -- provided by the publisher.

"The old abandoned school in Silver City is being fixed up as an art center and the Boxcar Children volunteer to help clean up the place. But the other volunteers are scared by the spooky goings-on in the school--doors lock by themselves, and chalkboard messages appear out of nowhere! Will the Aldens find out the secret of the haunted school?"--

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

When the Aldens go to the Pickering Natural History Museum to assist with the opening of a dinosaur exhibit, their work is hampered by a series of mysterious happenings.

The Aldens are helping out at a rescue ranch for horses. Jessie's favorite is a beautiful horse named Dragon. When Dragon and other horses disappear from the pasture, the Boxcar children must saddle up for a mystery. What's happening to the horses at the Dare To Dream Ranch?

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.

When the Aldens visit Yellowstone they discover a map showing the way to an old cabin where gold is supposedly hidden, but they encounter lots of interference in their attempts to hike the trail.