Sum Fun - A fun number puzzle game for iPhone and iPad.

Wikids - An encyclopedia that talks to your kids

Sum - Simple Maths Puzzle - How fast can you add two numbers?

Numito - Word and number puzzles game, similar to Countdown GameShow

Griddition - Griddition is a challenging numbers puzzle where you must fill a grid with numbers, Sudoku-style.

Duolingo - Duolingo is a free language learning app for iOS, Windows and Android devices. The app makes learning a new language fun by breaking learning into small lessons where you can earn points and move up through the levels. Read more about Duolingo.