jeanie congratulations 
As everyone else has said, it's brilliant! I've had the pleasure of my two youngest (oh, and their mother!) here this morning. They are aged 16 months and 2 months and it was wonderful, especially now I've put the house back together again 
DD3, their mum, had 3 miscarriages prior to successfully carrying her first to full term and it was a very traumatic pregnancy. I was slightly [shocked] when she announced that she was pregnant again so soon but all went well and she now has a boy and a girl. I suspect that won't be the end of it either.
You'll love it 