This week in children's apps features Eric Carle's Counting with the Very Hungry Caterpillar, turning the beloved picture book into a counting game with five different levels. Also this week is Woolly Mammoth in Trouble, which tells the story of the mammoth finding his way back to his herd after getting lost. The New Adventures of Peter Rabbit takes Beatrix Potter's classic story and brings it to devices. And finally, Snowman Joe tells the story of the snowman who wanted to talk with the stars.

Title: Counting with the Very Hungry Caterpillar

Publisher: Night & Day Studios

Release date: October 4, 2011

Price: $2.99

Background: Find and eat all of the caterpillar's favorite foods while learning the fundamentals of numbers and counting in this interactive math game.

Features: Five levels of increasing difficulty; the fifth level includes a time limit with points awarded for each correct food that is found, reinforcing basic addition skills. Music by Mozart.

Title: Woolly Mammoth in Trouble

Publisher: Oceanhouse Media

Release date: September 29, 2011

Price: $1.99

Background: Woolly Mammoth gets lost in a snowstorm and has to find his way back to his herd with the sabertooth tigers trailing him.

Features: Professional narration, reviewed and approved by paleontologists at the Smithsonian Institution. Features Read to Me, Read it Myself, and Auto Play. Pages pan and zoom to accentuate the artwork.

Title: The New Adventures of Peter Rabbit

Publisher: Oceanhouse Media

Release date: October 5, 2011

Price: $1.99

Background: Beatrix Potter's classic comes to the App Store. Peter Rabbit loves telling stories but when he runs into Mr. McGregor's cat, he finds he's told one story to many.

Features: Professional narration, background audio, enlarged artwork, read to me, read it myself, and auto play modes. Individual words are highlighted as the story is read and words zoom up when pictures are touched.

Title: Snowman Joe

Publisher: Lemon Jam Inc.

Release date: September 28, 2011

Price: $1.99

Background: The bedtime story about the snowman who rolled around Snowman Street trying to say hello to the stars. Written in verse by Stefanie Fife and featuring the illustrations of Michael Humphries.

Features: Auto Play, Read to Me, Read It Myself modes, live narration and animation, full musical score.