This week in children's apps, we feature apps with familiar characters who go on two different kinds of explorations—one of the alphabet, and the other of the ocean's waters.

Title: Little Critter ABCs

Publisher: Oceanhouse Media

Release Date: May 14, 2014

Price: $0.99

Background: Learn your ABCs with Little Critter in this interactive board book app–from airplane to zebra and everything in between.

Features: Explore pictures, learn new vocabulary, and personalize the story with your own narration.

Title: Wish for a Fish (Dr. Seuss/Cat in the Hat)

Publisher: Oceanhouse Media

Release Date: May 21, 2014

Price: $3.99

Background: Come along with the Cat in the Hat as he plunges from the sunny surface waters to the deepest ocean trenches in search of an amazing array of marine creatures.

Features: Interact with jellyfish, dolphins, manatees, and whales; two ways to read; tappable words and pictures.