my daughter is 8 and was diagnosed at 4. She learns to get by. She is stronger than I will ever be. If I was in the amount of pain that I know she is in I would just sit and cry. She gets up and goes to school and plays with her friends and goes to dance and all the normal things that an eight year old does. We just have to take more breaks than the average eight year old. Your son will learn to deal with his limitations and you will find new reasons to love him more everyday because of it.