My two bits: my kids are 20, 16, and 11. It seems like maybe last week we were looking at ultrasounds like this. Actually, the quality is so much better now, I'm envious! But anyway, my point is this -- almost literally before you know it, that little hand will be wrapped around a steering wheel.
Treasure every day like there won't be any more. Because even if there are many, many more (and I hope there are), they will pass in an eyeblink.
Congratulations Dad! Life is good, isn't it. :cheers"