Well considering that we have 4 kids, youngest 23 and oldest 29, when they are this age, we can tell you without hesitation that the greatest and coolest gift you can get is watching your newest family members, "the grandkids" opening gifts and watching them glow in the presence of a gathered family smiling, laughing and having a good time.
I was in no hurry to see our daughters have kids or to be a grandpa, but now that it's here, NOTHING COMPARES!