Hello: I am new to this blog and need some advice and tips on how to discuss the disease with my son who was diagnosed at the age of 2 and is now 8. We have never sat down and had a heart to heart discussion about why his muscles are weak and he cannot do things like riding a bike or skateboard and why he gets hurt so easily. I am never prepared for the questions he is now asking me. Keep in mind that he is developmentally behind and probably won't understand a long explanation. We need to…