Congrats Mo! I just spent a couple of days with my grand daughters, capped off with a day of fishing with my son. IMHO it doen't get better than that. I think you may be suprised on how much grandchildren brings back memories from when your kids were young.
The good thing about being a grandparent, is that you can give them back when you are finished spoiling them.
As a smoker, consider buying a box of cigar and smoking one on his birthday each year.
Ken