There are some pretty weird grown-ups living in Bailey City. But could the substitute school secretary really be a gremlin messing up the electricity? The Bailey School kids are going to find out!

Shelly is a princess! A real princess! It's been a well-kept secret in Trident City, but now the word is out, and Shelly doesn't know how to act! Should she start wearing a glittery crown? Or move to a grand undersea palace? Will her friends have to call her Your Highness? Being a princess may be exciting, but Shelly's not sure she can truly play this royal part.

Mermaids Shelly and Echo are excited to begin third grade at the prestigious Trident Academy, but snooty Pearl, jokester Rocky, brilliant Kiki, grumpy Mr. Fangtooth, and an argument over their first project challenge the best friends. Includes facts about marine plants and animals and words to the Mermaid Tales Song.

The Bailey School kids suspect that the man selling cookies in the school cafeteria is Frankenstein's monster.

The Bailey School kids investigate to see if a mad scientist can turn a snow sculpture into a real dragon.