This week in children's apps features the first in Dr. Seuss's Cat in the Hat Learning Library app series, There's No Place Like Space!: All About Our Solar System, which takes players on a tour of the solar system with the Cat in the Hat. The Journey Advent Calendar unlocks a new activity every day leading up to Christmas. Another holiday app, A Charlie Brown Christmas, retells the 1965 classic as an interactive app, complete with Peter Robbins, the original voice of Charlie Brown, narrating.

Title: There's No Place Like Space!: All About Our Solar System

Publisher: Oceanhouse Media, Inc.

Release date: November 16, 2011

Price: $3.99

Background: The first app in the new series of The Cat in the Hat's Learning Library. Players follow along as the Cat in the Hat takes Sally and Dick on a trip through the solar system, visiting each planet and telling fun facts along the way.

Features: Players can tap stars in the sky to reveal constellations, learn the order of planets in the solar system through a Seussian mnemonic device, and search the sky for planets with a telescope.

Title: The Journey Advent Calendar

Publisher: Abingdon Press

Release date: November 11, 2011

Price: $2.99

Background: This app is designed to celebrate the days leading up to Christmas. The app begins with seven categories of activities: videos, connect the dots, coloring, jigsaw puzzles, flipcard games, greeting cards, and quizzes. Beginning December 1, a new activity is unlocked each day.

Features: Spanish and English languages.

Title: A Charlie Brown Christmas

Publisher: Loud Crow Interactive

Release date: November 17, 2011

Price: $6.99

Background: Help Charlie Brown, Snoopy, and the entire Peanuts gang as they discover the true meaning of Christmas. Peter Robbins, the original voice of Charlie Brown, narrates the 1965 classic, presented here as an interactive storybook.

Features: Play Schroeder's piano, fingerpaint with the gang, go carolling with the Peanuts choir, unlock decorations for a Charlie Brown Christmas Tree.