With her kitten, Moisturizer, missing and having fought with her best friend, Margaret, eight-year-old Clementine finds it hard to concentrate on doing her best as her classmate's Friend of the Week.

When a puppy who is being trained as a police dog goes missing, third-grader Judy forms a detective agency to solve the mystery, imitating her literary heroine, Nancy Drew.

When a baseball game is stopped because of a lost ball, Cam uses her photographic memory to find the ball.

Nate the Great and his dog Sludge look for Annie's housekey which has mysteriously disappeared.

At Green Lawn Elementary, the entire school becomes involved in a mystery when Mr. Bones, the skeleton in the nurse's office, disappears.

When first-grader Roscoe discovers that his stuffed pig is missing from his backpack, he accuses the class bully of "pig-napping" and gets even by taking the bully's teddy bear.

When three leprechaun statues disappear just before St. Patrick's Day, Bradley, Brian, Nate, Lucy, and other friends follow clues in order to prove that Lucky O'Leary is innocent of the crime.

Two turtles find a hat that looks good on both of them, but, with fairness in mind, they decide to leave it be, until night falls and one of the turtles changes its mind.

La La Rose, a young girl's stuffed rabbit, gets lost in Luxembourg Gardens.

Nini Cat enjoys her outdoor adventure until she ventures too far and cannot find her way home.