A few times I have tried the "yeah he is starting school" and it has worked a couple times. Other times they start asking lots of questions about K. "does your school have full day K?" or "is he taking the bus" and all sorts of things. That's when it gets weird. And if DS is around he will say "actually I am starting first when they say Kindergarten" That's when it is the most uncomfortable. I will survive. Pretty soon I think I will start identifying him by his grade instead of age. It will make things easier at times.