This week offers a look at Nickelodeon’s Olivia as well as a journey to the bottom of the sea.

Title: Olivia Acts Out

Publisher: Polin 8

Release date: June 6, 2011

Price: $3.99

Background: Based on Ian Falconer’s popular picture book series and Nickelodean TV show.

Features: Children can read for themselves or have the app read to them; intuitive child-friendly interface; crisp 3D graphics and sound effects; and when kids touch a character they get to see an animation or hear a funny. Bonus: Olivia dances to the Olivia theme song in an animated video.

Title: Journey to the Deep

Publisher: Lerner Digital

Release date: May 31, 2011

Price: $2.99

Background: Based on the award-winning books by Rebecca Johnson, the app takes the viewer on a mission with scientists to the deepest parts of the ocean.

Features: Video and photographic documentation of strange and often newly discovered sea creatures; visits to research sites around the world; links to websites and discussion groups and a video introduction by Rebecca L. Johnson.