Robert Papp

While spending two days touring a zoo to see the baby animals, the four Alden children, aged six to fourteen, help catch an escaped monkey, participate in a photography contest, and investigate a missing camera.

The four Alden children, aged six to fourteen, volunteer at the new recycling center in town, and help uncover who is breaking in and making a mess each night.

When Lanie Holland, who loves science and nature, starts a wild flower garden to attract butterflies, it brings her into conflict with a neighbor who calls it a "weed garden" that should be replaced and uses pesticides in her own garden.

Caroline and her mother make a dangerous trip across Lake Ontario to the British fort where her father is a prisoner. When Mama isn't allowed to see Papa, it's up to Caroline to deliver a secret message to him--right under the nose of a British guard.

Eleven-year-old Mia has been training for a year to prepare for the Regionals, but her sportsmanship, not her skill, is tested when a family crisis threatens to pull her from the competition.

The Aldens visit Grandfather's friend at the Ogopogo Retreat and aided by puzzling clues, embark on a treasure hunt to prevent the retreat from being sold.

The Aldens try to solve a series of mysteries which took place in an old hotel in Kansas which they visit.

When the Alden children accompany their grandfather on a trip to Seattle, they discover clues throughout the city, seemingly planted just for them.

The Aldens investigate when an old wooden mask they have found is stolen.

A letter arrives for Caroline, asking her to come help her uncle Aaron and cousin Lydia on their new farm for the summer. Although Caroline is reluctant to leave her family, she's eager to lend a hand. So when she suspects that a thief has been stealing much-needed food from the farm, Caroline helps keep watch to guard against the uninvited visitor. Then she makes an unexpected discovery - and learns that some things are not as simple as they seem....