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.

Nate the Great finds mystery at the beach when Oliver's beach bag vanishes.

When her best toy mysteriously disappears, Olivia the feisty pig is determined to find out who is responsible.

Nate the Great investigates the disappearance of a homemade pillowcase belonging to Rosamond's cat Big Hex.

When Pinkalicious and her friend Molly go to the Pinkville Fair, everything reminds Pinkalicious of Goldilicious and she starts to miss her unicorn. Fortunately, Pinkalicious appears with her own best friend, another unicorn.

When her doll Marabelle goes missing, Nancy and her friend Bree become sleuths to crack the case.

When a wolf cub and little girl are lost in a snowstorm they must find their way home.

"Amelia Bedelia loses her tooth . . . and then she loses it again. But it's finders keepers in the end"-- Provided by publisher.

"Third-grader Aven Green has been solving mysteries for a whole month, cracking such cases as The Mystery of the Cranky Mom. But can this perceptive detective solve two cases at the same time? First her teacher's lunch bag disappears. Then Aven's great-grandma's dog goes missing. Fortunately, since Aven was born without arms, all the "arm" cells went to her super-powered brain instead (that's her theory)."-- Publisher's description.

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