Math

Ryne is having trouble adding two numbers together. So long story short we were in the car the other day and I hear "Hey mom! What is 2+1+3=?" Obviously I replied "I don't know what is it?" He replies"6" I was floored I thought I was going to have to stop in the middle of the road. I was so excited and so was he once he realized he was right. I think what really got me was he came up with it by himself and figured it out.