Waypoint EDU - Waypoint EDU is a fun, educational augmented-reality geocaching game for classrooms and families.
Mathgoras - Mathgoras is an educational mobile game, focused on the logical thinking of children in primary schools with tasks focused on the child's behavior in everyday life.
Tiny Tap - Create educational games from your photos
Hi Nano - Science for those who hate science.
MentalUP - Entertain and test your children with >120 games
Reading List - Reading List is a read-it-later app by Microsoft, which is bundled in Windows 8.1 onwards.