Jack and Annie travel in their magic tree house to the land of the mystical selkies to seek a magical sword for Merlin.

The magic tree house takes Jack and Annie to Antarctica to search for the fourth secret of happiness for Merlin.

Jack and Annie travel in their Magic Tree House back to a Hawaiian island of long ago where they make friends, learn how to surf, and encounter a tsunami.

When money disappears from fourth-grader Evan's pocket and everyone thinks that his annoying classmate Scott stole it, Evan's younger sister stages a trial involving the entire class, trying to prove what happened.

When the Aldens visit friends in Vermont, they're in for a teddy treat, the annual Bear Jamboree, celebrating toy bears from all over the world! The Aldens soon encounter an unbearable mystery: a very rare and valuable bear has disappeared from the toy hospital. Now it's up to the children to track down the teddy thief?

Jack and Annie travel back to nineteenth-century Ireland to inspire a young Augusta Gregory to share her love of Irish legends and folktales with the world.

The magic tree house carries Jack and Annie to New York City in 1938 on a mission to rescue the last unicorn.

While visiting an aquarium in Florida, the Aldens discover that the Ocean Adventure Park's great white shark has a very human enemy.

The Boxcar Children are going to summer camp and are looking forward to a week of new friends, exciting activities, and, most of all, the annual camp Olympics. As soon as camp begins, everything begins to go wrong for the Aldens-they lose their luggage, the camp flag disappears from Henry's cabin, and campers on the other team use one of Jessie's ideas to score points for themselves. Are some campers so desperate to win the Olympics that they are...

When an elderly friend is injured, the Alden children offer to help him with his window-washing business in their small town of Greenfield and agree to help him solve a riddle that has arrived in a mysterious invitation.