My son really enjoys going to the park. We have a local skate park geared more towards older kids in our area and he enjoys going there to meet other kids and try out new tricks. I have packed a picnic before and spent the afternoon just hanging together.
I also, enjoy taking my son with me to do outreach to other single moms. We visit friends in the hospital, a friend battling cancer, a single mom going through a hard time. I usually make a special time after we serve to either go grab something to eat or walk around a park to talk about why we serve and the importance of sharing with others and how he felt after giving. It has proven to be a wonderful learning opportunity and fulfilling time for both of us.