The lodge is having its annual winter carnival, and the Boxcar Children sign up to compete in events like skiing, skating, sledding, and building snow and ice sculptures. But no sooner has the competition begun than the children have a mystery to solve!

The Boxcar Children decide to raise money to help the Greenfield hospital. At Beth’s suggestion, they form a service called The Boxcar Helpers - to babysit, wash cars, mow lawns, and care for pets. But Beth keeps disappearing. And then other things start to go wrong. Is someone trying to put them out of business?

The Boxcar Children are going to a dog show. They meet all kinds of dogs, from a spotted Dalmatian to a big, hairy sheepdog. But then strange things start happening at the dog show, and no one knows why. Can the children solve the mystery and save the day?

Henry, Jessie, Violet, and Benny are going to visit a castle! Built long ago, the castle is now being turned into a museum. As the Boxcar Children help to restore it, they see mysterious lights and hear strange music. Faces appear in windows - and then disappear. Can the children solve the mystery hidden within the castle’s walls?

The Boxcar Children learn lots of interesting things about the Navajos - but best of all is a legend about an ancient Native American village that once existed nearby. Curious, the children begin digging there and uncover some valuable artifacts. But it seems someone wants the village to stay buried!

The Boxcar Children are going on a canoe trip with Grandfather and Aunt Jane. They enjoy paddling across the sparkling lake and camping under the stars. But their trip really gets interesting when they find a mysterious riddle leading them to hidden treasure!

Aunt Jane takes the Aldens to stay with her friend, Kay, who owns an old, shabby motel in Florida. Kay is ready to sell the motel, when the children offer to help fix it up and put it back in business. But they soon learn that someone is trying to make sure it stays out of business - forever.

When the Aldens hear that Mr. Wood's cat Spotzie is missing, they immediately help out by putting up "LOST CAT" posters and going door-to-door with a photograph of the cat. But along the way, they meet some strange characters, receive frightening phone calls, and even find a cat that looks just like Spotzie - but is it? It seems that the more they search, the more mysterious the mystery becomes!

The Boxcar Children have a chance to be in a real play - The Wizard of Oz! Jessie is chosen for the Cowardly Lion. Benny will play a munchkin. Even Watch has a part and all the Aldens are helping with the show. Then mysterious things begin to happen. Someone makes a threatening phone call and a costume is destroyed. Maybe the show won’t go on - unless the Boxcar Children can solve the mystery before opening night!

The Aldens must find a way to solve many mysteries, and all before 5:00 p.m. on Tuesday! Strange things are happening in Greenfield where the Boxcar Children live. Stray cats and dogs appear on doorsteps, but the animal shelter is forced to close, and a nice old woman disappears. Henry, Jessie, Violet, and Benny are very worried about Mrs. Newcombe. Is she in danger? Who are the strange men lurking around her house?

An orchestra is coming to town! The children are excited to hear the orchestra play, to meet the musicians, and to learn how to make their own instruments. The orchestra is also displaying a very valuable, old piece of music. But when it mysteriously disappears, it's up to the Boxcar Children to find it!

The four Aldens like visiting the large old museum owned by their grandfather's friend. But then Jessie sees a huge, scary shadow moving in the room where the dinosaur skeletons are on display. And bones from the enormous Tyrannosaurus rex disappear. They must find the missing bones and solve the mystery before an exhibit is scheduled to open - or there might not be a dinosaur exhibit at all!

The Aldens are helping out at their favorite ice cream store in town, the Shoppe. When very strange things begin to happen, the Shoppe is in danger of losing its customers and going out of business. Can the Boxcar Children solve the mystery and save the Shoppe before it’s too late?

The Aldens are so excited when they get to meet other ballonists, learn how hot air balloons work, and even help the crew launch a balloon. Then, things start to go wrong. Someone is trying to ruin the rally, and the Boxcar Children might not get the chance to ride in a hot air balloon after all - unless they solve the mystery in time.

The Boxcar Children and their grandfather are going to New Orleans. The Aldens like exploring the city. Most of all, they like helping Grandfather's friend clean up her old, dusty bookstore. They discover lots of interesting things in the store, especially a beautiful set of fairy tales. But then mysterious things start to happen. One of the books in the set is missing! Someone is after something the Boxcar Children have. Will they be able to solve this new, exciting mystery?