Good stuff David!

If I had it to do all over again, I think I would have skipped the kids (had 2 daughters) and gone right to grandchildren (have).3 girls, 1 boy between 2-4 yrs).

There are clearly some logistics issues to work through that way, but you can play with and spoil them and when they smell bad or you've had enough for one day, you can just send them home.

Enjoy the time with him, it seems to go very quickly.