GCompris is a high quality educational software suite, including a large number of activities for children aged 2 to 10.
Some of the activities are game orientated, but nonetheless still educational.
Here is the list of activity categories with some examples:
Currently GCompris offers more than 100 activities, and more are being developed. GCompris is free software, it means that you can adapt it to your own needs, improve it, and most importantly share it with children everywhere.
The GCompris project is hosted and developed by the KDE community.