Mohammad,
The best choice for breakfast with Mickey and friends is undoubtedly
Chef Mickey's, located in the Contemporary Resort. The real perk here, beyond the good food and great company, is that you can eat there, regardless of what park you decided to visit that day.
As for other special activities, there really are too many to list in one place. But if it were me, and Mickey and his friends were an important part of my day, I would go to the Magic Kingdom and make sure to enter the Toontown Hall of Fame area when it opens at around 11 am. Visit Mickey and Minnie's Country Houses. They really bring these characters to life for children, as you tour their homes. And of course a meet-and-greet with Mickey after seeing his home is a really great experience for parent and child alike.
If you have some other kind of special event in mind, write us back and let us know what might be special to you. If it can be found, someone on the Moms panel can find it!
Have a magical (and delicious) vacation!