GCompris is an educational software for kids. It contains 120+ activities. Some activities are for pre-school children, some are more suitable for 6 - 10 years and others for older children.
And others can be added. There exist long wish list:
Choose 1-3 activities for Bachelor’s Thesis and 3-9 for Diploma Thesis (depends on activity implementation difficulty) and implement it. Or come with your own idea for activity.